Airworthiness Directives; Boeing Model 757-200, -200CB, -200PF, and -300 Series Airplanes, 37132-37137 [E7-13265]
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37132
Federal Register / Vol. 72, No. 130 / Monday, July 9, 2007 / Proposed Rules
Regulatory Findings
We have determined that this
proposed AD would not have federalism
implications under Executive Order
13132. This proposed AD would not
have a substantial direct effect on the
States, on the relationship between the
national Government and the States, or
on the distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify that the proposed regulation:
1. Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
2. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); and
3. Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
We prepared a regulatory evaluation
of the estimated costs to comply with
this proposed AD and placed it in the
AD docket. See the ADDRESSES section
for a location to examine the regulatory
evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Safety.
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
Boeing: Docket No. FAA–2007–28620;
Directorate Identifier 2007–NM–090–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by August 23, 2007.
pwalker on PROD1PC71 with NOTICES2
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing Model 747–
100, 747–100B, 747–100B SUD, 747–200B,
747–200C, 747–200F, 747–300, 747SR, and
747SP series airplanes, certificated in any
category; as identified in Boeing Alert
Service Bulletin 747–53A2658, dated
February 22, 2007.
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Unsafe Condition
(d) This AD results from a report that an
operator found a 1.65-inch crack on the
station (STA) 1241 bulkhead fitting on the
left side of a Boeing Model 747–200F series
airplane that had accumulated 17,332 total
flight cycles. We are issuing this AD to detect
and correct cracking in the STA 1241
bulkhead fittings, which could result in
reduced structural integrity of the airplane.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
the compliance times specified, unless the
actions have already been done.
Inspections and Corrective Action
(f) At the applicable time specified in
paragraph 1.E., ‘‘Compliance,’’ of Boeing
Alert Service Bulletin 747–53A2658, dated
February 22, 2007: Do internal surface highfrequency eddy current and external
ultrasonic inspections for cracking of the
STA 1241 bulkhead fittings just above the
canted pressure deck; determine the edge
margin at seven fastener positions on each
side of the airplane; and do all applicable
related investigative/corrective actions; by
doing all of the actions specified in the
Accomplishment Instructions of Boeing Alert
Service Bulletin 747–53A2658, dated
February 22, 2007, except as provided by
paragraphs (f)(1) and (f)(2) of this AD. Do all
applicable related investigative/corrective
actions before further flight. Repeat the
inspections thereafter at the applicable
interval specified in paragraph 1.E.,
‘‘Compliance’’ of the service bulletin.
(1) Where the service bulletin specifies to
contact Boeing for appropriate action, before
further flight, do the action using a method
approved in accordance with the procedures
specified in paragraph (g) of this AD.
(2) Where the service bulletin specifies a
compliance time after the date on the service
bulletin, this AD requires compliance within
the specified compliance time after the
effective date of this AD.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Seattle Aircraft
Certification Office (ACO), FAA, has the
authority to approve AMOCs for this AD, if
requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. Before using any approved AMOC on
any airplane to which the AMOC applies,
notify your appropriate principal inspector
(PI) in the FAA Flight Standards District
Office (FSDO), or lacking a PI, your local
FSDO.
(3) An AMOC that provides an acceptable
level of safety may be used for any repair
required by this AD, if it is approved by an
Authorized Representative for the Boeing
Commercial Airplanes Delegation Option
Authorization Organization who has been
authorized by the Manager, Seattle ACO, to
make those findings. For a repair method to
be approved, the repair must meet the
certification basis of the airplane, and the
approval must specifically refer to this AD.
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Issued in Renton, Washington, on June 25,
2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–13263 Filed 7–6–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–28598; Directorate
Identifier 2007–NM–036–AD]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 757–200, –200CB, –200PF, and
–300 Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for all
Boeing Model 757–200, –200CB,
–200PF, and –300 series airplanes. This
proposed AD would require installation
of an automatic shutoff system for the
center tank fuel boost pumps, and
installation of a placard in the airplane
flight deck if necessary. This proposed
AD would also require revisions to the
Limitations and Normal Procedures
sections of the airplane flight manual to
advise the flightcrew of certain
operating restrictions for airplanes
equipped with an automated center tank
fuel pump shutoff control. This
proposed AD would also require a
revision to the Airworthiness
Limitations (AWLs) section of the
Instructions for Continued
Airworthiness to incorporate AWL No.
28–AWL–20 and No. 28–AWL–26. This
proposed AD would also require
replacement of the fuel control panel
assembly with a modified part,
installation of two secondary pump
control relays for the center tank fuel
pumps, other specified actions, and
concurrent modification of the fuel
control panel assembly. This proposed
AD results from fuel system reviews
conducted by the manufacturer. We are
proposing this AD to prevent center
tank fuel pump operation with
continuous low pressure, which could
lead to friction sparks or overheating in
the fuel pump inlet or could create a
potential ignition source inside the
center fuel tank; these conditions, in
combination with flammable fuel
vapors, could result in a center fuel tank
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explosion and consequent loss of the
airplane.
DATES: We must receive comments on
this proposed AD by August 23, 2007.
ADDRESSES: Use one of the following
addresses to submit comments on this
proposed AD.
• DOT Docket Web site: Go to
https://dms.dot.gov and follow the
instructions for sending your comments
electronically.
• Government-wide rulemaking Web
site: Go to https://www.regulations.gov
and follow the instructions for sending
your comments electronically.
• Mail: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590.
• Fax: (202) 493–2251.
• Hand Delivery: Room W12–140 on
the ground floor of the West Building,
1200 New Jersey Avenue, SE.,
Washington, DC, between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays.
Contact Boeing Commercial
Airplanes, P.O. Box 3707, Seattle,
Washington 98124–2207, for the service
information identified in this proposed
AD.
FOR FURTHER INFORMATION CONTACT: Judy
Coyle, Aerospace Engineer, Propulsion
Branch, ANM–140S, FAA, Seattle
Aircraft Certification Office, 1601 Lind
Avenue, SW., Renton, Washington
98057–3356; telephone (425) 917–6497;
fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant
written data, views, or arguments
regarding this proposed AD. Send your
comments to an address listed in the
ADDRESSES section. Include the docket
number ‘‘FAA–2007–28598; Directorate
Identifier 2007–NM–036–AD’’ at the
beginning of your comments. We
specifically invite comments on the
overall regulatory, economic,
environmental, and energy aspects of
the proposed AD. We will consider all
comments received by the closing date
and may amend the proposed AD in
light of those comments.
We will post all comments we
receive, without change, to https://
dms.dot.gov, including any personal
information you provide. We will also
post a report summarizing each
substantive verbal contact with FAA
personnel concerning this proposed AD.
Using the search function of that Web
site, anyone can find and read the
comments in any of our dockets,
including the name of the individual
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who sent the comment (or signed the
comment on behalf of an association,
business, labor union, etc.). You may
review DOT’s complete Privacy Act
Statement in the Federal Register
published on April 11, 2000 (65 FR
19477–78), or you may visit https://
dms.dot.gov.
Examining the Docket
You may examine the AD docket on
the Internet at https://dms.dot.gov, or in
person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
The Docket Operations office (telephone
(800) 647–5527) is located on the
ground floor of the West Building at the
DOT street address stated in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
the Docket Management System receives
them.
Discussion
The FAA has examined the
underlying safety issues involved in fuel
tank explosions on several large
transport airplanes, including the
adequacy of existing regulations, the
service history of airplanes subject to
those regulations, and existing
maintenance practices for fuel tank
systems. As a result of those findings,
we issued a regulation titled ‘‘Transport
Airplane Fuel Tank System Design
Review, Flammability Reduction and
Maintenance and Inspection
Requirements’’ (66 FR 23086, May 7,
2001). In addition to new airworthiness
standards for transport airplanes and
new maintenance requirements, this
rule included Special Federal Aviation
Regulation No. 88 (‘‘SFAR 88,’’
Amendment 21–78, and subsequent
Amendments 21–82 and 21–83).
Among other actions, SFAR 88
requires certain type design (i.e., type
certificate (TC) and supplemental type
certificate (STC)) holders to substantiate
that their fuel tank systems can prevent
ignition sources in the fuel tanks. This
requirement applies to type design
holders for large turbine-powered
transport airplanes and for subsequent
modifications to those airplanes. It
requires them to perform design reviews
and to develop design changes and
maintenance procedures if their designs
do not meet the new fuel tank safety
standards. As explained in the preamble
to the rule, we intended to adopt
airworthiness directives to mandate any
changes found necessary to address
unsafe conditions identified as a result
of these reviews.
In evaluating these design reviews, we
have established four criteria intended
to define the unsafe conditions
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37133
associated with fuel tank systems that
require corrective actions. The
percentage of operating time during
which fuel tanks are exposed to
flammable conditions is one of these
criteria. The other three criteria address
the failure types under evaluation:
Single failures, single failures in
combination with a latent condition(s),
and in-service failure experience. For all
four criteria, the evaluations included
consideration of previous actions taken
that may mitigate the need for further
action.
We have determined that the actions
identified in this proposed AD are
necessary to reduce the potential of
ignition sources inside fuel tanks,
which, in combination with flammable
fuel vapors, could result in fuel tank
explosions and consequent loss of the
airplane.
Boeing has found that certain failures
will result in the center tank fuel pumps
continuing to run after the tank has been
depleted. Depending on the failure,
pump low pressure may not be
annunciated, or power may not be
removed from the pump when the
pump has been commanded ‘‘OFF.’’
Operation of the center tank fuel pump
with continuous low pressure could
lead to friction sparks or overheating in
the fuel boost pump inlet. This
condition, if not corrected, could result
in a fuel tank explosion and consequent
loss of the airplane.
Other Relevant Rulemaking
On September 24, 2002, we issued AD
2002–19–52, amendment 39–12900 (67
FR 61253, September 30, 2002),
applicable to all Boeing Model 737–600,
–700, –700C, –800, and –900 series
airplanes, Model 747 airplanes, and
Model 757 airplanes. That AD requires
revising the airplane flight manual
(AFM) to advise the flightcrew of certain
operating restrictions for maintaining
minimum fuel levels, prohibits use of
the horizontal stabilizer tank on certain
airplanes, and prohibits the installation
of certain fuel pumps. That AD requires
concurrent removal of the currently
required AFM revisions and insertion of
new AFM revisions, requires
installation of placards to alert the
flightcrew to the operating restrictions,
and prohibits installation of any uninspected pumps. That AD permits the
AFM revision and placard to be
removed under certain conditions.
Installation of a placard in accordance
with paragraph (e) of AD 2002–19–52,
amendment 39–12900, is acceptable for
compliance with paragraph (h) of this
AD.
On November 23, 2002, we issued
emergency AD 2002–24–51, amendment
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39–12992, applicable to all Boeing
Model 737–600, –700, –700C, –800, and
–900 series airplanes, Model 747
airplanes, and Model 757 airplanes. (We
issued a Federal Register version of AD
2002–24–51 on December 23, 2002 (68
FR 10, January 2, 2003).) That AD
requires revising the AFM to require the
flightcrew to maintain certain minimum
fuel levels in the center fuel tanks and,
for certain airplanes, to prohibit the use
of the horizontal stabilizer fuel tank and
certain center auxiliary fuel tanks.
Accomplishing the actions specified in
paragraphs (g), (h), (i), and (j) of this
proposed AD would terminate the AFM
revision specified in paragraph (e) of AD
2002–24–51 for Model 757–200,
–200CB, –200PF, and –300 series
airplanes that have the automatic
shutoff system installed.
Relevant Service Information
We have reviewed Boeing Alert
Service Bulletin 757–28A0081, dated
February 16, 2006, for Model 757–200,
–200CB, and –200PF series airplanes;
and Boeing Alert Service Bulletin 757–
28A0082, dated February 16, 2006, for
Model 757–300 series airplanes. These
service bulletins describe procedures for
installing an automatic shutoff system
for the center tank fuel boost pumps.
Installation of the automatic shutoff
system includes the following actions:
• In the main flight compartment,
installing time delay relays in the P33
and P37 relay panels and installing
automatic shutoff fuel test switches at
the E2–1 rack stanchion.
• At the P11–3 and P11–4 circuit
breaker panels in the flight
compartment, adding new circuit
breakers and replacing the light plate
with a new improved light plate.
• Changing certain wire bundles in
the P11–3 and P11–4 circuit breaker
panels, in the P33 and P37 relay panels,
between the P33 relay panel and the P5
overhead panel, between the P37 relay
panel and the P5 overhead panel, and
between the P11–3 circuit breaker panel
and the P33 relay panel.
• Installing new wire bundles
between the P33 relay panel and the test
switch at the E2–1 rack stanchion and
between the P37 relay panel and the test
switch at the E2–1 rack stanchion.
We have also reviewed Section 9 of
the Boeing 757 Maintenance Planning
Data (MPD) Document, D622N001–9,
Revision January 2006 (hereafter
referred to as ‘‘Revision January 2006 of
the MPD’’). Subsection G,
‘‘AIRWORTHINESS LIMITATIONS—
FUEL SYSTEMS AWLs,’’ of Revision
January 2006 of the MPD describes new
airworthiness limitations (AWLs) for
fuel tank systems. The AWLs include:
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• AWL inspections, which are
periodic inspections of certain features
for latent failures that could contribute
to an ignition source.
• Critical design configuration control
limitations (CDCCLs), which are
limitation requirements to preserve a
critical ignition source prevention
feature of the fuel tank system design
that is necessary to prevent the
occurrence of an unsafe condition. The
purpose of a CDCCL is to provide
instruction to retain the critical ignition
source prevention feature during
configuration change that may be
caused by alterations, repairs, or
maintenance actions. A CDCCL is not a
periodic inspection. Revision January
2006 of the MPD adds new fuel system
AWL No. 28–AWL–20, which is a
repetitive inspection of the automatic
shutoff system for the center tank fuel
boost pumps to verify functional
integrity.
We have also reviewed Boeing Alert
Service Bulletin 757–28A0105, Revision
1, dated April 2, 2007, for Model 757–
200, –200CB, –200PF, and –300 series
airplanes. This service bulletin
describes procedures for replacing fuel
control panel assembly part number (P/
N) 233N3206–( ) (equipment number
M10055) with a modified fuel control
panel assembly, installing two
secondary override pump control relays
for the center tank fuel pumps in the
P33 and P37 relays panels, and doing
other specified actions. The other
specified actions include the following:
• Changing the W2066 wire bundle
located between the P5 overhead panel
in the flight compartment and the P33
relay panel located in the main
equipment center.
• Changing the W2070 wire bundle
located between the P5 overhead panel
in the flight compartment and P37 relay
panel located in the main equipment
center.
• Changing the W1230 wire bundle at
the P33 relay panel.
• Changing the W1270 wire bundle at
the P37 relay panel.
• Doing a functional test of the left
and right primary and secondary
override pump control relays.
• Doing a pump reversal test of the
left and right override fuel pumps.
We have also reviewed Boeing
Temporary Revision (TR) 09–006, dated
January 2007. Boeing TR 09–006 is
published as Section 9 of the Boeing 757
MPD Document, D622N001–9, Revision
January 2007 (hereafter referred to as
‘‘Revision January 2007 of the MPD’’).
Subsection G of Revision January 2007
of the MPD adds new fuel system AWL
No. 28–AWL–26, which is a repetitive
inspection of the power failed on
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protection system for the center tank
fuel boost pumps to verify functional
integrity.
Boeing Alert Service Bulletin 757–
28A0105 specifies prior or concurrent
accomplishment of BAE Systems
Service Bulletin 233N3206–28–03,
dated October 4, 2006. The BAE
Systems service bulletin describes
procedures for modifying the M10055
fuel control panel assembly, P/N
233N3206–( ), to provide protection
from ‘‘uncommanded pump ON’’
situations. The modification includes
rerouting the J2 connector wire bundles
from the forward left main pump switch
S2 to the left center pump switch S6,
rerouting the J3 connector wire bundles
from the forward right main pump
switch S5 to the right center pump
switch S7, and installing new tie clips
to secure the rerouted wire bundles.
Accomplishing the actions specified
in the service information is intended to
adequately address the unsafe
condition.
FAA’s Determination and Requirements
of the Proposed AD
We have evaluated all pertinent
information and identified an unsafe
condition that is likely to exist or
develop on other airplanes of this same
type design. For this reason, we are
proposing this AD, which would require
the following actions:
• Installation of an automatic shutoff
system for the center tank fuel boost
pumps.
• Installation of a placard in the
airplane flight deck, if necessary.
(Placards are necessary only for ‘‘mixed
fleet operation,’’ which means that some
airplanes in an operator’s fleet are
equipped with automatic shutoff
systems while other airplanes are not.)
• Revisions to the Limitations and
Normal Procedures sections of the AFM
to advise the flightcrew of certain
operating restrictions for airplanes
equipped with an automated center tank
fuel pump shutoff control.
• Revision to the AWLs section of the
Instructions for Continued
Airworthiness to incorporate AWL No.
28–AWL–20, which would require
repetitive inspections of the automatic
shutoff system for the center tank fuel
boost pumps to verify functional
integrity.
• Replacement of fuel control panel
assembly P/N 233N3206–( ) with a
modified fuel control panel assembly,
installation of two secondary override
pump control relays for the center tank
fuel pumps in the P33 and P37 relays
panels, and other specified actions.
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• Concurrent modification of the
M10055 fuel control panel assembly, P/
N 233N3206–( ).
• Revision to the AWLs section of the
Instructions for Continued
Airworthiness to incorporate AWL No.
28–AWL–26, which would require
repetitive inspections of the power
failed on protection system for the
center tank fuel boost pumps to verify
functional integrity.
This proposed AD would also allow
accomplishing the revision to the AWLs
section of the Instructions for Continued
Airworthiness in accordance with later
revisions of the MPD as an acceptable
method of compliance if they are
approved by the Manager, Seattle
Aircraft Certification Office (ACO),
FAA.
Costs of Compliance
There are about 1,094 Model 757–200,
–200CB, –200PF, and –300 series
airplanes of the affected design in the
worldwide fleet. The following table
provides the estimated costs, at an
average labor rate of $80 per hour, for
U.S. operators to comply with this
proposed AD. The estimated cost of
parts in the following table depends on
the configuration of an airplane.
ESTIMATED COSTS
Cost per airplane
1
$8,309 to
$9,194.
$8,598 to
$8,654.
$10 ..............
$15,309 to
$16,474.
$12,678 to
$12,734.
$90 ..............
706
$9,836,659 to
$10,395,094.
$950,850 to
$955,050.
$63,540.
1
1
29
None ...........
None ...........
$2,097 .........
$80 ..............
$80 ..............
$4,417 .........
706
706
706
$56,480.
$56,480.
$3,118,402.
2
$40 ..............
$200 ............
706
$141,200.
Action
757–200, –200CB, and –200PF,
series airplanes.
757–300 series airplanes ...........
Installation of the automatic
shutoff system.
Installation of the automatic
shutoff system.
Placard installation, if necessary
91
AFM revision ..............................
Maintenance program revision ..
Installation of secondary pump
control relays.
Concurrent modification of the
fuel control panel assembly.
757–200, –200CB, –200PF, and
–300 series airplanes.
Authority for This Rulemaking
Title 49 of the United States Code
specifies the FAA’s authority to issue
rules on aviation safety. Subtitle I,
Section 106, describes the authority of
the FAA Administrator. Subtitle VII,
Aviation Programs, describes in more
detail the scope of the Agency’s
authority.
We are issuing this rulemaking under
the authority described in Subtitle VII,
Part A, Subpart III, Section 44701,
‘‘General requirements.’’ Under that
section, Congress charges the FAA with
promoting safe flight of civil aircraft in
air commerce by prescribing regulations
for practices, methods, and procedures
the Administrator finds necessary for
safety in air commerce. This regulation
is within the scope of that authority
because it addresses an unsafe condition
that is likely to exist or develop on
products identified in this rulemaking
action.
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Regulatory Findings
We have determined that this
proposed AD would not have federalism
implications under Executive Order
13132. This proposed AD would not
have a substantial direct effect on the
States, on the relationship between the
national Government and the States, or
on the distribution of power and
responsibilities among the various
levels of government.
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51
For the reasons discussed above, I
certify that the proposed regulation:
1. Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
2. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); and
3. Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act. We prepared a
regulatory evaluation of the estimated
costs to comply with this proposed AD
and placed it in the AD docket. See the
ADDRESSES section for a location to
examine the regulatory evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Safety.
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
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Number of
U.S.-registered airplanes
Parts
Model
Sfmt 4702
631
75
Fleet cost
by adding the following new
airworthiness directive (AD):
Boeing: Docket No. FAA–2007–28598;
Directorate Identifier 2007–NM–036–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by August 23, 2007.
Affected ADs
(b) Accomplishing certain paragraphs of
this AD terminates certain requirements of
AD 2002–24–51, amendment 39–12992.
Applicability
(c) This AD applies to all Boeing Model
757–200, –200CB, –200PF, and –300 series
airplanes, certificated in any category.
Note 1: This AD requires revisions to
certain operator maintenance documents to
include new inspections of the automatic
shutoff system for the center tank fuel boost
pumps. Compliance with these inspections is
required by 14 CFR 43.16 and 91.403(c). For
airplanes that have been previously
modified, altered, or repaired in the areas
addressed by these inspections, the operator
may not be able to accomplish the
inspections described in the revisions. In this
situation, to comply with 14 CFR 91.403(c),
the operator must request approval for an
alternative method of compliance according
to paragraph (p) of this AD. The request
should include a description of changes to
the required inspections that will ensure
acceptable maintenance of the automatic
shutoff system.
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Federal Register / Vol. 72, No. 130 / Monday, July 9, 2007 / Proposed Rules
Unsafe Condition
(d) This AD results from fuel system
reviews conducted by the manufacturer. We
are issuing this AD to prevent center tank
fuel pump operation with continuous low
pressure, which could lead to friction sparks
or overheating in the fuel pump inlet or
could create a potential ignition source
inside the center fuel tank; these conditions,
in combination with flammable fuel vapors,
could result in a center fuel tank explosion
and consequent loss of the airplane.
Compliance
(e) You are responsible for having the
actions required by this AD performed within
the compliance times specified, unless the
actions have already been done.
Service Bulletin References
(f) The term ‘‘service bulletin,’’ as used in
this AD, means the Accomplishment
Instructions of the following service
bulletins, as applicable.
TABLE 1.—SERVICE BULLETIN REFERENCES
Airplanes
Action
Service Bulletin
Model 757–200, –200CB, and –200PF series
airplanes.
Model 757–300 series airplanes ........................
Installation specified in paragraph (g) of this
AD.
Installation specified in paragraph (g) of this
AD.
Installation specified in paragraph (k) of this
AD.
Boeing Alert Service Bulletin 757–28A0081,
dated February 16, 2006.
Boeing Alert Service Bulletin 757–28A0082,
dated February 16, 2006.
Boeing Alert Service Bulletin 757–28A0105,
Revision 1, dated April 2, 2007.
For Model 757–200, –200CB, –200PF, and
–300 series airplanes.
Installation of Automatic Shutoff System for
the Center Tank Fuel Boost Pumps
fleet, the placard installation specified in this
paragraph is not required.
(g) Within 36 months after the effective
date of this AD: Install an automatic shutoff
system for the center tank fuel boost pumps,
by accomplishing all of the actions specified
in the applicable service bulletin. If a placard
has been previously installed on the airplane
in accordance with paragraph (h) of this AD,
the placard may be removed from the flight
deck of only that airplane after the automatic
shutoff system has been installed. Installing
automatic shutoff systems on all airplanes in
an operator’s fleet, in accordance with this
paragraph, terminates the placard installation
required by paragraph (h) of this AD, for all
airplanes in an operator’s fleet.
Airplane Flight Manual (AFM) Revision
(i) Concurrently with accomplishing the
actions required by paragraph (g) of this AD:
Do the actions specified in paragraphs (i)(1)
and (i)(2) of this AD.
(1) Revise Section 1 of the Limitations
section of the Boeing 757 AFM to include the
following statement. This may be done by
inserting a copy of this AD in the AFM.
‘‘Intentional dry running of a center tank
fuel pump (CTR L FUEL PUMP or CTR R
FUEL PUMP message displayed on EICAS) is
prohibited.’’
pwalker on PROD1PC71 with NOTICES2
Placard Installation for Mixed Fleet
Operation
(h) Concurrently with installing an
automatic shutoff system on any airplane in
a operator’s fleet, as required by paragraph (g)
of this AD: Install a placard adjacent to the
pilot’s primary flight display on all airplanes
in the operator’s fleet not equipped with an
automatic shutoff system for the center tank
fuel boost pumps. The placard reads as
follows (alternative placard wording may be
used if approved by an appropriate FAA
Principal Operations Inspector):
‘‘AD 2002–24–51 fuel usage restrictions
required.’’
Installation of a placard in accordance with
paragraph (e) of AD 2002–19–52, amendment
39–12900, is acceptable for compliance with
the requirements of this paragraph. Installing
an automatic shutoff system on an airplane,
in accordance with paragraph (g) of this AD,
terminates the placard installation required
by this paragraph, for only that airplane.
Installing automatic shutoff systems on all
airplanes in an operator’s fleet, in accordance
with paragraph (g) of this AD, terminates the
placard installation required by this
paragraph, for all airplanes in an operator’s
fleet. If automatic shutoff systems are
installed concurrently on all airplanes in an
operator’s fleet in accordance with paragraph
(g) of this AD, or if operation according to the
fuel usage restrictions of AD 2002–24–51 is
maintained until automatic shutoff systems
are installed on all airplanes in an operator’s
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16:43 Jul 06, 2007
Jkt 211001
Note 2: When a statement identical to that
in paragraph (i)(1) of this AD has been
included in the general revisions of the AFM,
the general revisions may be inserted into the
AFM, and the copy of this AD may be
removed from the AFM.
(2) Revise Section 3.1 of the Normal
Procedures section of the Boeing 757 AFM to
include the following statements. This may
be done by inserting a copy of this AD in the
AFM.
‘‘Procedures contained on this page are
applicable to airplanes equipped with the
automatic center tank fuel pump power
removal system per Boeing Service Bulletin
757–28A0081 (757–200 Series) or 757–
28A0082 (757–300 Series).
CENTER TANK FUEL PUMPS
Center tank fuel pump switches must not
be ‘‘ON’’ unless personnel are available in
the flight deck to monitor low PRESS lights.
For ground operations prior to engine start:
The center tank fuel pump switches must not
be positioned ON unless the center tank
contains usable fuel. With center tank fuel
pump switches ON, verify both center tank
fuel pump low PRESS lights are illuminated
and EICAS CTR L FUEL PUMP and CTR R
FUEL PUMP messages are displayed.
For ground operations after engine start
and flight operations: The center tank fuel
pump switch must be selected OFF when the
respective CTR L FUEL PUMP or CTR R
FUEL PUMP message displays. Both center
tank fuel pump switches must be selected
OFF when either the CTR L FUEL PUMP or
CTR R FUEL PUMP message displays if the
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Frm 00015
Fmt 4702
Sfmt 4702
center tank is empty. During cruise flight,
both center tank pump switches may be
reselected ON whenever center tank usable
fuel is indicated.
DE-FUELING AND FUEL TRANSFER
When transferring fuel or de-fueling center
or main wing tanks, the center fuel pump low
PRESS must be monitored and the fuel pump
switches positioned to ‘‘OFF’’ at the first
indication of low pressure. Prior to
transferring fuel or de-fueling, conduct a
lamp test of the respective fuel pump low
PRESS lights.
De-fueling main wing tanks with
passengers onboard is prohibited if main tank
fuel pumps are powered. De-fueling center
wing tank with passengers onboard is
prohibited if the center wing tank fuel pumps
are powered with the automatic center tank
fuel pump power removal system inhibited.
Fuel may be transferred from tank to tank, or
the aircraft may be de-fueled with passengers
onboard, provided fuel quantity in the tank
from which fuel is being transferred from is
maintained above 2,000 pounds (900
kilograms).’’
Note 3: When statements identical to those
in paragraph (i)(2) of this AD have been
included in the general revisions of the AFM,
the general revisions may be inserted into the
AFM, and the copy of this AD may be
removed from the AFM.
Airworthiness Limitations (AWLs) Revision
for AWL No. 28–AWL–20
(j) Concurrently with accomplishing the
actions required by paragraph (g) of this AD:
Revise the AWLs section of the Instructions
for Continued Airworthiness by
incorporating AWL No. 28–AWL–20 of
Subsection G of the Boeing 757 Maintenance
Planning Data (MPD) Document, D622N001–
9, Section 9, Revision January 2006, into the
MPD. Accomplishing the revision in
accordance with a later revision of the MPD
is an acceptable method of compliance if the
revision is approved by the Manager, Seattle
Aircraft Certification Office (ACO), FAA.
Installation of Secondary Override Pump
Control Relays
(k) Within 60 months after the effective
date of this AD: Replace fuel control panel
assembly part number 233N3206–( )
E:\FR\FM\09JYP1.SGM
09JYP1
Federal Register / Vol. 72, No. 130 / Monday, July 9, 2007 / Proposed Rules
(equipment number M10055) with a
modified fuel control assembly, install the
secondary override pump control relays for
the center tank fuel pumps in the P33 and
P37 relays panels, and do all other specified
actions as applicable, by accomplishing all of
the applicable actions specified in the
applicable service bulletin. The other
specified actions must be accomplished
before further flight after installing the
secondary override pump control relays.
Concurrent Modification of the M10055 Fuel
Control Panel Assembly
(l) For airplanes identified in paragraph
1.A.1. of Boeing Alert Service Bulletin 757–
28A0105, Revision 1, dated April 2, 2007,
equipped with any fuel control panel
assembly identified in paragraph 1.A. of BAE
Systems Service Bulletin 233N3206–28–03,
dated October 4, 2006: Before or concurrently
with accomplishing the actions required by
paragraph (k) of this AD, modify the fuel
control panel assembly, in accordance with
BAE Systems Service Bulletin 233N3206–28–
03, dated October 4, 2006.
AWLs Revision for AWL No. 28–AWL–26
(m) Before or concurrently with
accomplishing the actions required by
paragraph (k) of this AD: Revise the AWLs
section of the Instructions for Continued
Airworthiness by incorporating AWL No. 28–
AWL–26 of Boeing Temporary Revision (TR)
09–006, dated January 2007, into the MPD.
Boeing TR 09–006 is published as Section 9
of the Boeing 757 MPD Document,
D622N001–9, Revision January 2007.
Accomplishing the revision in accordance
with a later revision of the MPD is an
acceptable method of compliance if the
revision is approved by the Manager, Seattle
ACO.
pwalker on PROD1PC71 with NOTICES2
Terminating Action for AD 2002–24–51
(n) Accomplishing the actions required by
paragraphs (g), (h), (i), and (j) of this AD
terminates the AFM limitations required by
paragraph (e) of AD 2002–24–51 for Model
757–200, –200CB, –200PF, and –300 series
airplanes that have the automatic shutoff
system installed, except for the following
limitation:
‘‘Warning—Do not reset a tripped fuel
pump circuit breaker.’’
Except for this limitation, all other AFM
limitations required by paragraph (e) of AD
2002–24–51 for Model 757–200, –200CB,
–200PF, and –300 series airplanes may be
removed from the AFM after accomplishing
the actions required by paragraphs (g), (h), (i),
and (j) of this AD.
Credit for Actions Done According to
Previous Issue of Service Bulletin
(o) Actions accomplished before the
effective date of this AD in accordance with
Boeing Alert Service Bulletin 757–28A0105,
dated January 31, 2007, are considered
acceptable for compliance with the
corresponding actions specified in paragraph
(k) of this AD.
Alternative Methods of Compliance
(AMOCs)
(p)(1) The Manager, Seattle ACO, has the
authority to approve AMOCs for this AD, if
VerDate Aug<31>2005
16:43 Jul 06, 2007
Jkt 211001
requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. Before using any approved AMOC on
any airplane to which the AMOC applies,
notify your appropriate principal inspector
(PI) in the FAA Flight Standards District
Office (FSDO), or lacking a PI, your local
FSDO.
(3) Installation of TDG Aerospace, Inc.
Universal Fault Interrupter (UFI), installed
and maintained in accordance with
Supplemental Type Certificate (STC)
ST01950LA, is approved as an AMOC with
paragraphs (a) through (m) of this AD.
Note 4: Information concerning the
existence of approved AMOCs with this AD,
if any, may be obtained from the Seattle
ACO.
Issued in Renton, Washington, on June 25,
2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–13265 Filed 7–6–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
Food and Drug Administration
21 CFR Part 2
[Docket No. 2006N–0454]
RIN 0910–AF93
Use of Ozone-Depleting Substances;
Removal of Essential-Use
Designations; Public Meeting
AGENCY:
Food and Drug Administration,
HHS.
Proposed rule; notice of public
meeting.
ACTION:
SUMMARY: The Food and Drug
Administration (FDA) is announcing a
public meeting to solicit comments on
a proposed rule that would amend
FDA’s regulation on the use of ozonedepleting substances (ODSs) in selfpressurized containers to remove
essential-use designations for certain
oral pressurized metered-dose inhalers
(MDIs). In the Federal Register of June
11, 2007 (72 FR 32030), the agency
proposed to remove the essential use
designation for MDIs containing
flunisolide, triamcinolone,
metaproterenol, pirbuterol, albuterol
and ipratropium in combination,
cromolyn, and nedocromil. Information
from the public meeting, which is
required by agency regulations, will be
considered in finalizing the rulemaking.
PO 00000
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Fmt 4702
Sfmt 4702
37137
The public meeting will be held
on August 2, 2007, from 9 a.m. to 3:30
p.m. Submit written or electronic
comments for consideration at the
meeting and requests to speak at the
meeting by July 25, 2007. Register to
attend the meeting by July 25, 2007.
Submit written or electronic comments
on the proposed rule and this notice by
August 10, 2007.
ADDRESSES: The public meeting will be
held at FDA, Center for Drug Evaluation
and Research Advisory Committee
Conference Room, 5630 Fishers Lane,
rm. 1066, Rockville, MD 20852. You
may submit comments, identified by
Docket No. 2006N–0454 and RIN
number 0910–AF93, by any of the
following methods:
Electronic Submissions
Submit electronic comments in the
following ways:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the
instructions for submitting comments.
• Agency Web site: https://
www.fda.gov/dockets/ecomments.
Follow the instructions for submitting
comments on the agency Web site.
Written Submissions
Submit written submissions in the
following ways:
• FAX: 301–827–6870.
• Mail/Hand delivery/Courier [For
paper, disk, or CD-ROM submissions]:
Division of Dockets Management (HFA–
305), Food and Drug Administration,
5630 Fishers Lane, rm. 1061, Rockville,
MD 20852.
To ensure more timely processing of
comments, FDA is no longer accepting
comments submitted directly to the
agency by e-mail. FDA encourages you
to continue to submit electronic
comments by using the Federal
eRulemaking Portal or the agency Web
site, as described previously in the
ADDRESSES portion of this document
under the Electronic Submissions
portion of this paragraph.
Instructions: All submissions received
must include the agency name and
Docket No(s). and Regulatory
Information Number (RIN) (if a RIN
number has been assigned) for this
rulemaking. All comments received may
be posted without change to https://
www.fda.gov/ohrms/dockets/
default.htm, including any personal
information provided. For additional
information on submitting comments,
see the ‘‘Comments’’ heading of the
SUPPLEMENTARY INFORMATION section of
this document.
Docket: For access to the docket to
read the proposed rule, background
documents, or comments received, go to
https://www.fda.gov/ohrms/dockets/
DATES:
E:\FR\FM\09JYP1.SGM
09JYP1
]]>Agencies
[Federal Register Volume 72, Number 130 (Monday, July 9, 2007)]
[Proposed Rules]
[Pages 37132-37137]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-13265]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-28598; Directorate Identifier 2007-NM-036-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 757-200, -200CB, -200PF,
and -300 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Boeing Model 757-200, -200CB, -200PF, and -300 series
airplanes. This proposed AD would require installation of an automatic
shutoff system for the center tank fuel boost pumps, and installation
of a placard in the airplane flight deck if necessary. This proposed AD
would also require revisions to the Limitations and Normal Procedures
sections of the airplane flight manual to advise the flightcrew of
certain operating restrictions for airplanes equipped with an automated
center tank fuel pump shutoff control. This proposed AD would also
require a revision to the Airworthiness Limitations (AWLs) section of
the Instructions for Continued Airworthiness to incorporate AWL No. 28-
AWL-20 and No. 28-AWL-26. This proposed AD would also require
replacement of the fuel control panel assembly with a modified part,
installation of two secondary pump control relays for the center tank
fuel pumps, other specified actions, and concurrent modification of the
fuel control panel assembly. This proposed AD results from fuel system
reviews conducted by the manufacturer. We are proposing this AD to
prevent center tank fuel pump operation with continuous low pressure,
which could lead to friction sparks or overheating in the fuel pump
inlet or could create a potential ignition source inside the center
fuel tank; these conditions, in combination with flammable fuel vapors,
could result in a center fuel tank
[[Page 37133]]
explosion and consequent loss of the airplane.
DATES: We must receive comments on this proposed AD by August 23, 2007.
ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
DOT Docket Web site: Go to https://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to https://
www.regulations.gov and follow the instructions for sending your
comments electronically.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room W12-140 on the ground floor of the
West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207, for the service information identified in this
proposed AD.
FOR FURTHER INFORMATION CONTACT: Judy Coyle, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 917-6497; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed in the ADDRESSES section. Include the docket number ``FAA-2007-
28598; Directorate Identifier 2007-NM-036-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of
that Web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You may review DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
may visit https://dms.dot.gov.
Examining the Docket
You may examine the AD docket on the Internet at https://
dms.dot.gov, or in person at the Docket Operations office between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The
Docket Operations office (telephone (800) 647-5527) is located on the
ground floor of the West Building at the DOT street address stated in
the ADDRESSES section. Comments will be available in the AD docket
shortly after the Docket Management System receives them.
Discussion
The FAA has examined the underlying safety issues involved in fuel
tank explosions on several large transport airplanes, including the
adequacy of existing regulations, the service history of airplanes
subject to those regulations, and existing maintenance practices for
fuel tank systems. As a result of those findings, we issued a
regulation titled ``Transport Airplane Fuel Tank System Design Review,
Flammability Reduction and Maintenance and Inspection Requirements''
(66 FR 23086, May 7, 2001). In addition to new airworthiness standards
for transport airplanes and new maintenance requirements, this rule
included Special Federal Aviation Regulation No. 88 (``SFAR 88,''
Amendment 21-78, and subsequent Amendments 21-82 and 21-83).
Among other actions, SFAR 88 requires certain type design (i.e.,
type certificate (TC) and supplemental type certificate (STC)) holders
to substantiate that their fuel tank systems can prevent ignition
sources in the fuel tanks. This requirement applies to type design
holders for large turbine-powered transport airplanes and for
subsequent modifications to those airplanes. It requires them to
perform design reviews and to develop design changes and maintenance
procedures if their designs do not meet the new fuel tank safety
standards. As explained in the preamble to the rule, we intended to
adopt airworthiness directives to mandate any changes found necessary
to address unsafe conditions identified as a result of these reviews.
In evaluating these design reviews, we have established four
criteria intended to define the unsafe conditions associated with fuel
tank systems that require corrective actions. The percentage of
operating time during which fuel tanks are exposed to flammable
conditions is one of these criteria. The other three criteria address
the failure types under evaluation: Single failures, single failures in
combination with a latent condition(s), and in-service failure
experience. For all four criteria, the evaluations included
consideration of previous actions taken that may mitigate the need for
further action.
We have determined that the actions identified in this proposed AD
are necessary to reduce the potential of ignition sources inside fuel
tanks, which, in combination with flammable fuel vapors, could result
in fuel tank explosions and consequent loss of the airplane.
Boeing has found that certain failures will result in the center
tank fuel pumps continuing to run after the tank has been depleted.
Depending on the failure, pump low pressure may not be annunciated, or
power may not be removed from the pump when the pump has been commanded
``OFF.'' Operation of the center tank fuel pump with continuous low
pressure could lead to friction sparks or overheating in the fuel boost
pump inlet. This condition, if not corrected, could result in a fuel
tank explosion and consequent loss of the airplane.
Other Relevant Rulemaking
On September 24, 2002, we issued AD 2002-19-52, amendment 39-12900
(67 FR 61253, September 30, 2002), applicable to all Boeing Model 737-
600, -700, -700C, -800, and -900 series airplanes, Model 747 airplanes,
and Model 757 airplanes. That AD requires revising the airplane flight
manual (AFM) to advise the flightcrew of certain operating restrictions
for maintaining minimum fuel levels, prohibits use of the horizontal
stabilizer tank on certain airplanes, and prohibits the installation of
certain fuel pumps. That AD requires concurrent removal of the
currently required AFM revisions and insertion of new AFM revisions,
requires installation of placards to alert the flightcrew to the
operating restrictions, and prohibits installation of any un-inspected
pumps. That AD permits the AFM revision and placard to be removed under
certain conditions. Installation of a placard in accordance with
paragraph (e) of AD 2002-19-52, amendment 39-12900, is acceptable for
compliance with paragraph (h) of this AD.
On November 23, 2002, we issued emergency AD 2002-24-51, amendment
[[Page 37134]]
39-12992, applicable to all Boeing Model 737-600, -700, -700C, -800,
and -900 series airplanes, Model 747 airplanes, and Model 757
airplanes. (We issued a Federal Register version of AD 2002-24-51 on
December 23, 2002 (68 FR 10, January 2, 2003).) That AD requires
revising the AFM to require the flightcrew to maintain certain minimum
fuel levels in the center fuel tanks and, for certain airplanes, to
prohibit the use of the horizontal stabilizer fuel tank and certain
center auxiliary fuel tanks. Accomplishing the actions specified in
paragraphs (g), (h), (i), and (j) of this proposed AD would terminate
the AFM revision specified in paragraph (e) of AD 2002-24-51 for Model
757-200, -200CB, -200PF, and -300 series airplanes that have the
automatic shutoff system installed.
Relevant Service Information
We have reviewed Boeing Alert Service Bulletin 757-28A0081, dated
February 16, 2006, for Model 757-200, -200CB, and -200PF series
airplanes; and Boeing Alert Service Bulletin 757-28A0082, dated
February 16, 2006, for Model 757-300 series airplanes. These service
bulletins describe procedures for installing an automatic shutoff
system for the center tank fuel boost pumps. Installation of the
automatic shutoff system includes the following actions:
In the main flight compartment, installing time delay
relays in the P33 and P37 relay panels and installing automatic shutoff
fuel test switches at the E2-1 rack stanchion.
At the P11-3 and P11-4 circuit breaker panels in the
flight compartment, adding new circuit breakers and replacing the light
plate with a new improved light plate.
Changing certain wire bundles in the P11-3 and P11-4
circuit breaker panels, in the P33 and P37 relay panels, between the
P33 relay panel and the P5 overhead panel, between the P37 relay panel
and the P5 overhead panel, and between the P11-3 circuit breaker panel
and the P33 relay panel.
Installing new wire bundles between the P33 relay panel
and the test switch at the E2-1 rack stanchion and between the P37
relay panel and the test switch at the E2-1 rack stanchion.
We have also reviewed Section 9 of the Boeing 757 Maintenance
Planning Data (MPD) Document, D622N001-9, Revision January 2006
(hereafter referred to as ``Revision January 2006 of the MPD'').
Subsection G, ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS AWLs,'' of
Revision January 2006 of the MPD describes new airworthiness
limitations (AWLs) for fuel tank systems. The AWLs include:
AWL inspections, which are periodic inspections of certain
features for latent failures that could contribute to an ignition
source.
Critical design configuration control limitations
(CDCCLs), which are limitation requirements to preserve a critical
ignition source prevention feature of the fuel tank system design that
is necessary to prevent the occurrence of an unsafe condition. The
purpose of a CDCCL is to provide instruction to retain the critical
ignition source prevention feature during configuration change that may
be caused by alterations, repairs, or maintenance actions. A CDCCL is
not a periodic inspection. Revision January 2006 of the MPD adds new
fuel system AWL No. 28-AWL-20, which is a repetitive inspection of the
automatic shutoff system for the center tank fuel boost pumps to verify
functional integrity.
We have also reviewed Boeing Alert Service Bulletin 757-28A0105,
Revision 1, dated April 2, 2007, for Model 757-200, -200CB, -200PF, and
-300 series airplanes. This service bulletin describes procedures for
replacing fuel control panel assembly part number (P/N) 233N3206-( )
(equipment number M10055) with a modified fuel control panel assembly,
installing two secondary override pump control relays for the center
tank fuel pumps in the P33 and P37 relays panels, and doing other
specified actions. The other specified actions include the following:
Changing the W2066 wire bundle located between the P5
overhead panel in the flight compartment and the P33 relay panel
located in the main equipment center.
Changing the W2070 wire bundle located between the P5
overhead panel in the flight compartment and P37 relay panel located in
the main equipment center.
Changing the W1230 wire bundle at the P33 relay panel.
Changing the W1270 wire bundle at the P37 relay panel.
Doing a functional test of the left and right primary and
secondary override pump control relays.
Doing a pump reversal test of the left and right override
fuel pumps.
We have also reviewed Boeing Temporary Revision (TR) 09-006, dated
January 2007. Boeing TR 09-006 is published as Section 9 of the Boeing
757 MPD Document, D622N001-9, Revision January 2007 (hereafter referred
to as ``Revision January 2007 of the MPD''). Subsection G of Revision
January 2007 of the MPD adds new fuel system AWL No. 28-AWL-26, which
is a repetitive inspection of the power failed on protection system for
the center tank fuel boost pumps to verify functional integrity.
Boeing Alert Service Bulletin 757-28A0105 specifies prior or
concurrent accomplishment of BAE Systems Service Bulletin 233N3206-28-
03, dated October 4, 2006. The BAE Systems service bulletin describes
procedures for modifying the M10055 fuel control panel assembly, P/N
233N3206-( ), to provide protection from ``uncommanded pump ON''
situations. The modification includes rerouting the J2 connector wire
bundles from the forward left main pump switch S2 to the left center
pump switch S6, rerouting the J3 connector wire bundles from the
forward right main pump switch S5 to the right center pump switch S7,
and installing new tie clips to secure the rerouted wire bundles.
Accomplishing the actions specified in the service information is
intended to adequately address the unsafe condition.
FAA's Determination and Requirements of the Proposed AD
We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other airplanes
of this same type design. For this reason, we are proposing this AD,
which would require the following actions:
Installation of an automatic shutoff system for the center
tank fuel boost pumps.
Installation of a placard in the airplane flight deck, if
necessary. (Placards are necessary only for ``mixed fleet operation,''
which means that some airplanes in an operator's fleet are equipped
with automatic shutoff systems while other airplanes are not.)
Revisions to the Limitations and Normal Procedures
sections of the AFM to advise the flightcrew of certain operating
restrictions for airplanes equipped with an automated center tank fuel
pump shutoff control.
Revision to the AWLs section of the Instructions for
Continued Airworthiness to incorporate AWL No. 28-AWL-20, which would
require repetitive inspections of the automatic shutoff system for the
center tank fuel boost pumps to verify functional integrity.
Replacement of fuel control panel assembly P/N 233N3206-(
) with a modified fuel control panel assembly, installation of two
secondary override pump control relays for the center tank fuel pumps
in the P33 and P37 relays panels, and other specified actions.
[[Page 37135]]
Concurrent modification of the M10055 fuel control panel
assembly, P/N 233N3206-( ).
Revision to the AWLs section of the Instructions for
Continued Airworthiness to incorporate AWL No. 28-AWL-26, which would
require repetitive inspections of the power failed on protection system
for the center tank fuel boost pumps to verify functional integrity.
This proposed AD would also allow accomplishing the revision to the
AWLs section of the Instructions for Continued Airworthiness in
accordance with later revisions of the MPD as an acceptable method of
compliance if they are approved by the Manager, Seattle Aircraft
Certification Office (ACO), FAA.
Costs of Compliance
There are about 1,094 Model 757-200, -200CB, -200PF, and -300
series airplanes of the affected design in the worldwide fleet. The
following table provides the estimated costs, at an average labor rate
of $80 per hour, for U.S. operators to comply with this proposed AD.
The estimated cost of parts in the following table depends on the
configuration of an airplane.
Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
Number of
U.S.-
Model Action Work hours Parts Cost per airplane registered Fleet cost
airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
757-200, -200CB, and -200PF, Installation of the 91 $8,309 to $9,194..... $15,309 to $16,474... 631 $9,836,659 to
series airplanes. automatic shutoff $10,395,094.
system.
757-300 series airplanes.......... Installation of the 51 $8,598 to $8,654..... $12,678 to $12,734... 75 $950,850 to $955,050.
automatic shutoff
system.
757-200, -200CB, -200PF, and -300 Placard installation, 1 $10.................. $90.................. 706 $63,540.
series airplanes. if necessary.
AFM revision......... 1 None................. $80.................. 706 $56,480.
Maintenance program 1 None................. $80.................. 706 $56,480.
revision.
Installation of 29 $2,097............... $4,417............... 706 $3,118,402.
secondary pump
control relays.
Concurrent 2 $40.................. $200................. 706 $141,200.
modification of the
fuel control panel
assembly.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
3. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act. We prepared a regulatory evaluation
of the estimated costs to comply with this proposed AD and placed it in
the AD docket. See the ADDRESSES section for a location to examine the
regulatory evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):
Boeing: Docket No. FAA-2007-28598; Directorate Identifier 2007-NM-
036-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by August
23, 2007.
Affected ADs
(b) Accomplishing certain paragraphs of this AD terminates
certain requirements of AD 2002-24-51, amendment 39-12992.
Applicability
(c) This AD applies to all Boeing Model 757-200, -200CB, -200PF,
and -300 series airplanes, certificated in any category.
Note 1: This AD requires revisions to certain operator
maintenance documents to include new inspections of the automatic
shutoff system for the center tank fuel boost pumps. Compliance with
these inspections is required by 14 CFR 43.16 and 91.403(c). For
airplanes that have been previously modified, altered, or repaired
in the areas addressed by these inspections, the operator may not be
able to accomplish the inspections described in the revisions. In
this situation, to comply with 14 CFR 91.403(c), the operator must
request approval for an alternative method of compliance according
to paragraph (p) of this AD. The request should include a
description of changes to the required inspections that will ensure
acceptable maintenance of the automatic shutoff system.
[[Page 37136]]
Unsafe Condition
(d) This AD results from fuel system reviews conducted by the
manufacturer. We are issuing this AD to prevent center tank fuel
pump operation with continuous low pressure, which could lead to
friction sparks or overheating in the fuel pump inlet or could
create a potential ignition source inside the center fuel tank;
these conditions, in combination with flammable fuel vapors, could
result in a center fuel tank explosion and consequent loss of the
airplane.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Service Bulletin References
(f) The term ``service bulletin,'' as used in this AD, means the
Accomplishment Instructions of the following service bulletins, as
applicable.
Table 1.--Service Bulletin References
------------------------------------------------------------------------
Airplanes Action Service Bulletin
------------------------------------------------------------------------
Model 757-200, -200CB, and - Installation Boeing Alert Service
200PF series airplanes. specified in Bulletin 757-
paragraph (g) of 28A0081, dated
this AD. February 16, 2006.
Model 757-300 series Installation Boeing Alert Service
airplanes. specified in Bulletin 757-
paragraph (g) of 28A0082, dated
this AD. February 16, 2006.
For Model 757-200, -200CB, - Installation Boeing Alert Service
200PF, and -300 series specified in Bulletin 757-
airplanes. paragraph (k) of 28A0105, Revision
this AD. 1, dated April 2,
2007.
------------------------------------------------------------------------
Installation of Automatic Shutoff System for the Center Tank Fuel Boost
Pumps
(g) Within 36 months after the effective date of this AD:
Install an automatic shutoff system for the center tank fuel boost
pumps, by accomplishing all of the actions specified in the
applicable service bulletin. If a placard has been previously
installed on the airplane in accordance with paragraph (h) of this
AD, the placard may be removed from the flight deck of only that
airplane after the automatic shutoff system has been installed.
Installing automatic shutoff systems on all airplanes in an
operator's fleet, in accordance with this paragraph, terminates the
placard installation required by paragraph (h) of this AD, for all
airplanes in an operator's fleet.
Placard Installation for Mixed Fleet Operation
(h) Concurrently with installing an automatic shutoff system on
any airplane in a operator's fleet, as required by paragraph (g) of
this AD: Install a placard adjacent to the pilot's primary flight
display on all airplanes in the operator's fleet not equipped with
an automatic shutoff system for the center tank fuel boost pumps.
The placard reads as follows (alternative placard wording may be
used if approved by an appropriate FAA Principal Operations
Inspector):
``AD 2002-24-51 fuel usage restrictions required.''
Installation of a placard in accordance with paragraph (e) of AD
2002-19-52, amendment 39-12900, is acceptable for compliance with
the requirements of this paragraph. Installing an automatic shutoff
system on an airplane, in accordance with paragraph (g) of this AD,
terminates the placard installation required by this paragraph, for
only that airplane. Installing automatic shutoff systems on all
airplanes in an operator's fleet, in accordance with paragraph (g)
of this AD, terminates the placard installation required by this
paragraph, for all airplanes in an operator's fleet. If automatic
shutoff systems are installed concurrently on all airplanes in an
operator's fleet in accordance with paragraph (g) of this AD, or if
operation according to the fuel usage restrictions of AD 2002-24-51
is maintained until automatic shutoff systems are installed on all
airplanes in an operator's fleet, the placard installation specified
in this paragraph is not required.
Airplane Flight Manual (AFM) Revision
(i) Concurrently with accomplishing the actions required by
paragraph (g) of this AD: Do the actions specified in paragraphs
(i)(1) and (i)(2) of this AD.
(1) Revise Section 1 of the Limitations section of the Boeing
757 AFM to include the following statement. This may be done by
inserting a copy of this AD in the AFM.
``Intentional dry running of a center tank fuel pump (CTR L FUEL
PUMP or CTR R FUEL PUMP message displayed on EICAS) is prohibited.''
Note 2: When a statement identical to that in paragraph (i)(1)
of this AD has been included in the general revisions of the AFM,
the general revisions may be inserted into the AFM, and the copy of
this AD may be removed from the AFM.
(2) Revise Section 3.1 of the Normal Procedures section of the
Boeing 757 AFM to include the following statements. This may be done
by inserting a copy of this AD in the AFM.
``Procedures contained on this page are applicable to airplanes
equipped with the automatic center tank fuel pump power removal
system per Boeing Service Bulletin 757-28A0081 (757-200 Series) or
757-28A0082 (757-300 Series).
CENTER TANK FUEL PUMPS
Center tank fuel pump switches must not be ``ON'' unless
personnel are available in the flight deck to monitor low PRESS
lights.
For ground operations prior to engine start: The center tank
fuel pump switches must not be positioned ON unless the center tank
contains usable fuel. With center tank fuel pump switches ON, verify
both center tank fuel pump low PRESS lights are illuminated and
EICAS CTR L FUEL PUMP and CTR R FUEL PUMP messages are displayed.
For ground operations after engine start and flight operations:
The center tank fuel pump switch must be selected OFF when the
respective CTR L FUEL PUMP or CTR R FUEL PUMP message displays. Both
center tank fuel pump switches must be selected OFF when either the
CTR L FUEL PUMP or CTR R FUEL PUMP message displays if the center
tank is empty. During cruise flight, both center tank pump switches
may be reselected ON whenever center tank usable fuel is indicated.
DE-FUELING AND FUEL TRANSFER
When transferring fuel or de-fueling center or main wing tanks,
the center fuel pump low PRESS must be monitored and the fuel pump
switches positioned to ``OFF'' at the first indication of low
pressure. Prior to transferring fuel or de-fueling, conduct a lamp
test of the respective fuel pump low PRESS lights.
De-fueling main wing tanks with passengers onboard is prohibited
if main tank fuel pumps are powered. De-fueling center wing tank
with passengers onboard is prohibited if the center wing tank fuel
pumps are powered with the automatic center tank fuel pump power
removal system inhibited. Fuel may be transferred from tank to tank,
or the aircraft may be de-fueled with passengers onboard, provided
fuel quantity in the tank from which fuel is being transferred from
is maintained above 2,000 pounds (900 kilograms).''
Note 3: When statements identical to those in paragraph (i)(2)
of this AD have been included in the general revisions of the AFM,
the general revisions may be inserted into the AFM, and the copy of
this AD may be removed from the AFM.
Airworthiness Limitations (AWLs) Revision for AWL No. 28-AWL-20
(j) Concurrently with accomplishing the actions required by
paragraph (g) of this AD: Revise the AWLs section of the
Instructions for Continued Airworthiness by incorporating AWL No.
28-AWL-20 of Subsection G of the Boeing 757 Maintenance Planning
Data (MPD) Document, D622N001-9, Section 9, Revision January 2006,
into the MPD. Accomplishing the revision in accordance with a later
revision of the MPD is an acceptable method of compliance if the
revision is approved by the Manager, Seattle Aircraft Certification
Office (ACO), FAA.
Installation of Secondary Override Pump Control Relays
(k) Within 60 months after the effective date of this AD:
Replace fuel control panel assembly part number 233N3206-( )
[[Page 37137]]
(equipment number M10055) with a modified fuel control assembly,
install the secondary override pump control relays for the center
tank fuel pumps in the P33 and P37 relays panels, and do all other
specified actions as applicable, by accomplishing all of the
applicable actions specified in the applicable service bulletin. The
other specified actions must be accomplished before further flight
after installing the secondary override pump control relays.
Concurrent Modification of the M10055 Fuel Control Panel Assembly
(l) For airplanes identified in paragraph 1.A.1. of Boeing Alert
Service Bulletin 757-28A0105, Revision 1, dated April 2, 2007,
equipped with any fuel control panel assembly identified in
paragraph 1.A. of BAE Systems Service Bulletin 233N3206-28-03, dated
October 4, 2006: Before or concurrently with accomplishing the
actions required by paragraph (k) of this AD, modify the fuel
control panel assembly, in accordance with BAE Systems Service
Bulletin 233N3206-28-03, dated October 4, 2006.
AWLs Revision for AWL No. 28-AWL-26
(m) Before or concurrently with accomplishing the actions
required by paragraph (k) of this AD: Revise the AWLs section of the
Instructions for Continued Airworthiness by incorporating AWL No.
28-AWL-26 of Boeing Temporary Revision (TR) 09-006, dated January
2007, into the MPD. Boeing TR 09-006 is published as Section 9 of
the Boeing 757 MPD Document, D622N001-9, Revision January 2007.
Accomplishing the revision in accordance with a later revision of
the MPD is an acceptable method of compliance if the revision is
approved by the Manager, Seattle ACO.
Terminating Action for AD 2002-24-51
(n) Accomplishing the actions required by paragraphs (g), (h),
(i), and (j) of this AD terminates the AFM limitations required by
paragraph (e) of AD 2002-24-51 for Model 757-200, -200CB, -200PF,
and -300 series airplanes that have the automatic shutoff system
installed, except for the following limitation:
``Warning--Do not reset a tripped fuel pump circuit breaker.''
Except for this limitation, all other AFM limitations required
by paragraph (e) of AD 2002-24-51 for Model 757-200, -200CB, -200PF,
and -300 series airplanes may be removed from the AFM after
accomplishing the actions required by paragraphs (g), (h), (i), and
(j) of this AD.
Credit for Actions Done According to Previous Issue of Service Bulletin
(o) Actions accomplished before the effective date of this AD in
accordance with Boeing Alert Service Bulletin 757-28A0105, dated
January 31, 2007, are considered acceptable for compliance with the
corresponding actions specified in paragraph (k) of this AD.
Alternative Methods of Compliance (AMOCs)
(p)(1) The Manager, Seattle ACO, has the authority to approve
AMOCs for this AD, if requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your appropriate principal inspector (PI) in the FAA
Flight Standards District Office (FSDO), or lacking a PI, your local
FSDO.
(3) Installation of TDG Aerospace, Inc. Universal Fault
Interrupter (UFI), installed and maintained in accordance with
Supplemental Type Certificate (STC) ST01950LA, is approved as an
AMOC with paragraphs (a) through (m) of this AD.
Note 4: Information concerning the existence of approved AMOCs
with this AD, if any, may be obtained from the Seattle ACO.
Issued in Renton, Washington, on June 25, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-13265 Filed 7-6-07; 8:45 am]
BILLING CODE 4910-13-P
