Airworthiness Directives; The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP Series Airplanes, 60661-60665 [2010-24717]
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<![CDATA[
Federal Register / Vol. 75, No. 190 / Friday, October 1, 2010 / Proposed Rules
Branch, ANM–116, Transport Airplane
Directorate, FAA, has the authority to
approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19.
Send information to ATTN: Tom Groves,
Aerospace Engineer, International Branch,
ANM–116, Transport Airplane Directorate,
FAA, 1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone (425)
227–1503; fax (425) 227–1149. Before using
any approved AMOC on any airplane to
which the AMOC applies, notify your
principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as
appropriate, or lacking a principal inspector,
your local Flight Standards District Office.
The AMOC approval letter must specifically
reference this AD.
(2) Airworthy Product: For any
requirement in this AD to obtain corrective
actions from a manufacturer or other source,
use these actions if they are FAA-approved.
Corrective actions are considered FAAapproved if they are approved by the State
of Design Authority (or their delegated
agent). You are required to assure the product
is airworthy before it is returned to service.
(3) Reporting Requirements: For any
reporting requirement in this AD, under the
provisions of the Paperwork Reduction Act
(44 U.S.C. 3501 et seq.), the Office of
Management and Budget (OMB) has
approved the information collection
requirements and has assigned OMB Control
Number 2120–0056.
Related Information
(k) Refer to MCAI European Aviation
Safety Agency (EASA) Airworthiness
Directive 2009–0266, dated December 17,
2009; and 328 Support Services Service
Bulletins SB–328–27–488 and SB–328J–27–
237, both dated August 25, 2009; for related
information.
Issued in Renton, Washington, on
September 23, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 2010–24716 Filed 9–30–10; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2008–1098; Directorate
Identifier 2008–NM–108–AD]
jlentini on DSKJ8SOYB1PROD with PROPOSALS
RIN 2120–AA64
Airworthiness Directives; The Boeing
Company Model 747–100, 747–100B,
747–100B SUD, 747–200B, 747–200C,
747–200F, 747–300, 747SR, and 747SP
Series Airplanes
Federal Aviation
Administration (FAA), DOT.
AGENCY:
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16:54 Sep 30, 2010
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Supplemental notice of
proposed rulemaking (NPRM);
reopening of comment period.
ACTION:
We are revising an earlier
proposed airworthiness directive (AD)
for certain Model 747–100, 747–100B,
747–100B SUD, 747–200B, 747–200C,
747–200F, 747–300, 747SR, and 747SP
series airplanes. The original NPRM
would have required adding two new
indicator lights on the P10 panel to
inform the captain and first officer of a
low pressure condition in the left and
right override/jettison pumps of the
center wing tanks. The original NPRM
would also have required replacing the
left and right override/jettison switches
on the M154 fuel control module on the
P4 panel with improved switches and
doing the associated wiring changes.
The original NPRM would have also
required a revision to the maintenance
program to incorporate airworthiness
limitation No. 28–AWL–22. The original
NPRM resulted from fuel system
reviews conducted by the manufacturer.
This action revises the original NPRM
by adding a revision to the airplane
flight manual to advise the flightcrew
what to do in the event that the pump
low pressure light on the flight
engineer’s panel does not illuminate
when the pump is selected off; and
requiring, for certain airplanes,
installation of a mounting bracket for
the new indicator lights. We are
proposing this supplemental NPRM to
prevent uncommanded operation of the
override/jettison pumps of the center
wing tanks, and failure to manually shut
off the override/jettison pumps at the
correct time, either of which could lead
to an ignition source inside the center
wing tank. This condition, in
combination with flammable fuel
vapors, could result in a center fuel tank
explosion and consequent loss of the
airplane.
SUMMARY:
We must receive comments on
this supplemental NPRM by October 26,
2010.
ADDRESSES: You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: 202–493–2251.
• 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.
• Hand Delivery: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590, between 9 a.m.
DATES:
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60661
and 5 p.m., Monday through Friday,
except Federal holidays.
For service information identified in
this proposed AD, contact Boeing
Commercial Airplanes, Attention: Data
& Services Management, P.O. Box 3707,
MC 2H–65, Seattle, Washington 98124–
2207; telephone 206–544–5000,
extension 1; fax 206–766–5680; e-mail
me.boecom@boeing.com; Internet
https://www.myboeingfleet.com. You
may review copies of the referenced
service information at the FAA,
Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington.
For information on the availability of
this material at the FAA, call 425–227–
1221.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Management Facility between 9
a.m. and 5 p.m., Monday through
Friday, except Federal holidays. The AD
docket contains this proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Office
(telephone 800–647–5527) is in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT:
Douglas Bryant, Aerospace Engineer,
Propulsion Branch, ANM–140S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 917–6505; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written
relevant data, views, or arguments about
this proposed AD. Send your comments
to an address listed under the
ADDRESSES section. Include ‘‘Docket No.
FAA–2008–1098; Directorate Identifier
2008–NM–108–AD’’ at the beginning of
your comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this proposed AD.
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Federal Register / Vol. 75, No. 190 / Friday, October 1, 2010 / Proposed Rules
Discussion
We issued a notice of proposed
rulemaking (NPRM) (the ‘‘original
NPRM’’) to amend 14 CFR part 39 to
include an airworthiness directive (AD)
that would apply to certain Model 747–
100, 747–100B, 747–100B SUD, 747–
200B, 747–200C, 747–200F, 747–300,
747SR, and 747SP series airplanes. That
original NPRM was published in the
Federal Register on October 16, 2008
(73 FR 61369). That original NPRM
proposed to require adding two new
indicator lights on the P10 panel to
inform the captain and first officer of a
low pressure condition in the left and
right override/jettison pumps of the
center wing tanks. The original NPRM
also proposed to require replacing the
left and right override/jettison switches
on the M154 fuel control module on the
P4 panel with improved switches and
doing the associated wiring changes.
The original NPRM also proposed to
require a revision to the maintenance
program to incorporate airworthiness
limitation No. 28–AWL–22.
Comments
We gave the public the opportunity to
participate in developing this AD. We
considered the comments received from
the two commenters.
jlentini on DSKJ8SOYB1PROD with PROPOSALS
Request To Revise the Airplane Flight
Manual (AFM)
Boeing requests that the original
NPRM be revised to add a requirement
to revise Section 3, ‘‘Normal
Procedures,’’ of the AFM to require
actions by the flight engineer in the
event that the pump low pressure light
on the flight engineer’s panel does not
illuminate when the pump is selected
off.
We agree that this supplemental
NPRM should be revised to require
including this information in the AFM.
However, we disagree with the specific
wording and AFM section proposed by
Boeing. In evaluating Boeing’s request,
we found that there are two causes for
an override/jettison pump to run dry.
The actions proposed by the original
NPRM were intended to prevent an
uncommanded-on event that could
result in the override/jettison pump
running dry, which could lead to an
ignition source in the center wing fuel
tank. We found that the original
proposed actions would address events
where the pumps run dry for extended
periods of time as might happen when
the flight engineer does not shut off the
pump at the appropriate time.
However, since the cause of the
uncommanded-on event still exists, we
find that the AFM must be revised to
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provide instructions to the flightcrew in
the event of a relay failure which leaves
the fuel pump powered on after the
pump has been switched off
(uncommanded-on). We have
determined that more precise wording
must be used in the supplemental
NPRM and that the wording should be
added to Section 1, ‘‘Certificate
Limitations,’’ of the AFM.
Therefore, we have added a new
paragraph (i) to this supplemental
NPRM and re-identified subsequent
paragraphs. We have also revised the
Costs of Compliance section of this
supplemental NPRM to include the
estimated costs for this new action. In
addition, we revised the unsafe
condition statement to include the
additional cause.
Request To Reference Later Revision of
Service Bulletin Cited in Original
NPRM
Northwest Airlines (NWA) requests
that we reference updated service
information (i.e., Boeing Service
Bulletin 747–28A2288, Revision 1,
dated January 21, 2010), instead of
Boeing Alert Service Bulletin 747–
28A2288, dated March 20, 2008, which
was referenced in the original NPRM as
the appropriate source of service
information for doing the required
actions. NWA notes that steps
3.B.46.b.(1) through 3.B.46.b.(11) of
Boeing Alert Service Bulletin 747–
28A2288, dated March 20, 2008, do not
state when the two new installed LOW
PRESS lights on the P10 panel come on.
NWA explains that if the LOW PRESS
lights on the P10 panel are not wired
correctly, and those steps are used, the
lights could be illuminated properly in
the ‘Test’ mode, but might not
illuminate in the actual non-‘test’ mode
with the override/jettison pump switch
in the ON position. NWA states that
Boeing responded to this concern and
stated that the original issue of the alert
service bulletin would be revised and
would reference actions that are the
same as those provided in AWL No. 28–
AWL–22 for the functional tests.
Since we published the original
NPRM, Boeing has published Boeing
Service Bulletin 747–28A2288, Revision
1, dated January 21, 2010. We agree to
reference the updated service bulletin as
the appropriate source of service
information for accomplishing the
installation of indicator lights and
replacement of switches required by this
supplemental NPRM. Boeing has
clarified Steps 3.B.44.b.(1) through
3.B.44.b.(11) of Boeing Service Bulletin
747–28A2288, Revision 1, dated January
21, 2010.
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In addition, Boeing has also included
installation instructions (which include
installing a mounting bracket) of the
LOW PRESS indicator lights for
airplanes that do not have the warning
panel (i.e., the P10 panel) installed, and
revised the airplane groups.
We have revised paragraphs (c) and
(g) of this supplemental NPRM to
reference Boeing Service Bulletin 747–
28A2288, Revision 1, dated January 21,
2010. For certain airplanes, we also
revised paragraph (g) of this
supplemental NPRM to require adding a
mounting bracket.
Request To Revise Summary and
Discussion Sections of Original NPRM
Boeing requests that we revise the
Summary and Discussion sections of the
original NPRM to add additional detail
to the description of required actions.
For the Summary section, Boeing
suggests that the text be revised to point
out:
• The redundancy in functionality
between the two P4 panel indicator
lights and the new indicator lights
added to the P10 panel;
• The different configurations of the
P10 panel (which means that for some
airplanes, a bracket would also be
installed to provide a mounting surface
for the new indicator lights); and
• To explain which flightcrew
member is responsible for responding to
indications of a pump uncommandedon event.
For the Discussion section, Boeing
also suggests that the text be revised to
point out the redundancy in
functionality between the two P4 panel
indicator lights and the new indicator
lights added to the P10 panel. Boeing
suggests that, in addition, the text
should be revised to provide further
details on the similarities and
differences between the indicator lights
on the P10 and P4 panels; information
on a switch replacement for the P4
panel; and further detail on how and
when the indicator lights turn on and
off along with a detailed description of
how a flight engineer should respond to
the indicator lights.
We agree that the sections of text need
to be clarified. The Summary section of
an AD is intended to provide only a
brief summary of the AD. Therefore, we
have not revised the Summary section
of this supplemental NPRM. Also, while
the Discussion section is the appropriate
section for the detailed information that
Boeing proposes, the Discussion section
from the original NPRM is not repeated
in this supplemental NPRM.
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Federal Register / Vol. 75, No. 190 / Friday, October 1, 2010 / Proposed Rules
Request To Revise the Work-Hour
Estimate
NWA requests that the work-hour
estimate to accomplish the original
NPRM be increased from the 28 workhours estimated in the original NPRM to
56.75 work-hours. NWA states that
Boeing Alert Service Bulletin 747–
28A2288, dated March 20, 2008, does
not include a work-hour estimate for
accomplishing access and closeup
actions provided in BAE Service
Bulletin 65B46124–28–03, dated March
28, 2007. NWA points out that the BAE
service bulletins, referenced in the
original NPRM (and the following table)
as additional sources of guidance,
provide an estimate of 10 work-hours
for access and closeup actions.
BAE SYSTEMS SERVICE BULLETINS
BAE Systems Service
Bulletin—
Dated—
65B46124-28-01
65B46124-28-02
65B46124-28-03
65B46214-28-01
65B46214-28-02
65B46214-28-03
February 16, 2006.
March 28, 2007.
March 28, 2007.
February 16, 2006.
March 28, 2007.
March 28, 2007.
.........
.........
.........
.........
.........
.........
We agree to revise the work-hour
estimate. However, we do not agree to
include incidental costs such as access
and closeup. Boeing Service Bulletin
747–28A2288, Revision 1, dated January
21, 2010, provides an estimate of 28
work-hours to accomplish the proposed
modification. The BAE service bulletins
referenced in that Boeing service
bulletin as additional sources of
guidance each provide an estimate of 2
additional work-hours to accomplish
the modification actions specified in
Boeing Service Bulletin 747–28A2288,
Revision 1, dated January 21, 2010. The
cost analysis in AD rulemaking actions,
however, typically does not include
incidental costs such as the time
required to gain access and closeup,
time necessary for planning, or time
necessitated by other administrative
actions. Those incidental costs, which
might vary significantly among
operators, are almost impossible to
calculate. We cannot provide specific
information regarding the cost of parts
from BAE to do the proposed
modification. The parts costs will likely
vary depending on the airplane group.
However, we can reasonably estimate
that the cost of the parts from BAE will
be at least between $100 and $200 per
airplane, depending on airplane group.
We specifically invite the submission of
comments and other data regarding the
costs of this proposed AD.
We have revised the estimate to
between 30 and 32 work-hours,
depending on airplane group. Also,
Boeing Service Bulletin 747–28A2288,
Revision 1, dated January 21, 2010,
revises the parts cost estimate provided
in the original issue of that service
bulletin. We have revised the parts costs
estimate in the Costs of Compliance
section of this supplemental NPRM
accordingly.
Incorrect Numbers
AWL No. 28–AWL–22 of Section D of
the Boeing 747–100/200/300/SP
Airworthiness Limitations (AWLs) and
Certification Maintenance Requirements
(CMRs), D6–13747–CMR, Revision
March 2008, contains an incorrect
section number. Where the AWL states
‘‘28–31–00,’’ the correct section number
is ‘‘28–42–00.’’ Boeing is aware of this
discrepancy and plans to issue a
revision. We have included this
information in paragraph (h) of this AD.
Boeing Service Bulletin 747–
28A2288, Revision 1, dated January 21,
60663
2010, contains an incorrect sub-section
number and incorrect part numbers.
Where Boeing Service Bulletin 747–
28A2288, Revision 1, dated January 21,
2010, states ‘‘20–60–00,’’ the correct subsection number is ‘‘28–60–06.’’ Where
Figures 22 through 32 of Boeing Service
Bulletin 747–28A2288, Revision 1,
dated January 21, 2010, state certain
part numbers for a nut, a bolt, and a
washer (BACN10JC06CD,
BACS12HN06–10, and NAS1149D0632J
respectively), the correct part numbers
are BACN10NW1, BACS12HN04–6 (for
a screw instead of a bolt), and
NAS1149DN416J, respectively. Boeing
is aware of these discrepancies and
plans to issue a revision. We have
included this information in paragraph
(g) of this AD.
FAA’s Determination and Proposed
Requirements of the Supplemental
NPRM
We are proposing this supplemental
NPRM because we evaluated all
pertinent information and determined
an unsafe condition exists and is likely
to exist or develop on other products of
the same type design. Certain changes
described above expand the scope of the
original NPRM. As a result, we have
determined that it is necessary to reopen
the comment period to provide
additional opportunity for the public to
comment on this supplemental NPRM.
Costs of Compliance
We estimate that this proposed AD
would affect 185 airplanes of U.S.
registry. The average labor rate per
work-hour is $85. The following table
provides the estimated costs for U.S.
operators to comply with this proposed
AD.
ESTIMATED COSTS
Action
Work-hours
Parts
Cost per product
Boeing Service Bulletin 747–
28A2288, Revision 1.
AFM revision .............................
Between 30 and 32 ..
Between $2,768 and
$2,868.
None .........................
Between $5,318 and
$5,588.
$85
1 ...............................
Authority for This Rulemaking
jlentini on DSKJ8SOYB1PROD with PROPOSALS
Number of
U.S.-registered
airplanes
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.
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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
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185
185
Fleet cost
Between $983,830
and $1,033,780.
$15,725
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 determined that this proposed AD
would not have federalism implications
under Executive Order 13132. This
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Federal Register / Vol. 75, No. 190 / Friday, October 1, 2010 / Proposed Rules
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 this 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.
You can find our regulatory
evaluation and the estimated costs of
compliance in the AD Docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
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
Unsafe Condition
[Amended]
2. The FAA amends § 39.13 by adding
the following new AD:
The Boeing Company: Docket No. FAA–
2008–1098; Directorate Identifier 2008–
NM–108–AD.
Comments Due Date
(a) We must receive comments by October
26, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to The Boeing
Company 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 Service Bulletin 747–28A2288,
Revision 1, dated January 21, 2010.
Note 1: This AD requires revisions to
certain operator maintenance documents to
include a new inspection. Compliance with
this inspection is required by 14 CFR
91.403(c). For airplanes that have been
previously modified, altered, or repaired in
the areas addressed by this inspection, 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 (AMOC)
according to paragraph (1) of this AD. The
request should include a description of
changes to the required inspection that will
ensure the continued operational safety of
the airplane.
Subject
(d) Air Transport Association (ATA) of
America Code 28: Fuel.
(e) This AD results from fuel system
reviews conducted by the manufacturer. The
Federal Aviation Administration is issuing
this AD to prevent uncommanded operation
of the override/jettison pumps of the center
wing tanks, and failure to manually shut off
the override/jettison pumps at the correct
time, either of which could lead to an
ignition source inside the center wing tank.
This condition, in combination with
flammable fuel vapors, could result in a
center fuel tank explosion and consequent
loss of the airplane.
Compliance
(f) You are responsible for having the
actions required by this AD performed within
the compliance times specified, unless the
actions have already been done.
Installation of Indicator Lights and
Replacement of Switches
(g) Within 36 months after the effective
date of this AD: Add two new indicator lights
on the P10 panel to inform the captain and
first officer of a low pressure condition in the
left and right override/jettison pumps of the
center wing tanks; and, for airplanes that do
not have the warning panel (P10 panel)
installed, add a mounting bracket; and
replace the left and right override/jettison
switches on the M154 fuel control module on
the P4 panel with improved switches; and do
the associated wiring changes. Accomplish
these actions by doing all of the applicable
actions specified in the Accomplishment
Instructions of Boeing Service Bulletin 747–
28A2288, Revision 1, dated January 21, 2010,
except where that service bulletin states ‘‘20–
60–00,’’ the correct sub-section number is
‘‘28–60–06,’’ and as described in Table 1 of
this AD.
TABLE 1—PART NUMBER CORRECTION
Part name
Part number specified in Figures 22 through 32 of Boeing
Service Bulletin 747–28A2288, Revision 1, dated January
21, 2010
Part name of correct part
Nut .........................................
Bolt ........................................
Washer ..................................
BACN10JC06CD ..................................................................
BACS12HN06–10 .................................................................
NAS1149D0632J ..................................................................
Nut .........................................
Screw ....................................
Washer ..................................
Note 2: For airplanes equipped with
certain M154 fuel control modules,
paragraph 2.C.2 of Boeing Service Bulletin
747–28A2288, Revision 1, dated January 21,
2010, refers to the BAE Systems service
bulletins identified in Table 2 of this AD, as
Correct part number
BACN10NW1
BACS12HN04–6
NAS1149DN416J
applicable, as additional sources of guidance
for replacing the switches.
TABLE 2—ADDITIONAL SOURCES OF GUIDANCE
jlentini on DSKJ8SOYB1PROD with PROPOSALS
Service bulletin
BAE
BAE
BAE
BAE
BAE
BAE
Systems
Systems
Systems
Systems
Systems
Systems
VerDate Mar<15>2010
Service
Service
Service
Service
Service
Service
Bulletin
Bulletin
Bulletin
Bulletin
Bulletin
Bulletin
65B46124-28-01
65B46124-28-02
65B46124-28-03
65B46214-28-01
65B46214-28-02
65B46214-28-03
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Date
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
......................................................................................................................
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February 16, 2006.
March 28, 2007.
March 28, 2007.
February 16, 2006.
March 28, 2007.
March 28, 2007.
Federal Register / Vol. 75, No. 190 / Friday, October 1, 2010 / Proposed Rules
Maintenance Program Revision
(h) Concurrently with accomplishing the
actions required by paragraph (g) of this AD,
revise the maintenance program by
incorporating Airworthiness Limitation
(AWL) No. 28–AWL–22 of Section D of the
Boeing 747–100/200/300/SP Airworthiness
Limitations (AWLs) and Certification
Maintenance Requirements (CMRs), D6–
13747–CMR, Revision March 2008. Where
the AWL states ‘‘28–31–00,’’ the correct
section number is ‘‘28–42–00.’’
Office. The AMOC approval letter must
specifically reference this AD.
Airplane Flight Manual (AFM) Revision
(i) Concurrently with accomplishing the
actions required by paragraph (g) of this AD,
revise Section 1, ‘‘Certificate Limitations,’’ of
the applicable Boeing 747 AFM to include
the following statement. This may be done by
inserting a copy of this AD into the AFM.
‘‘When the center tank override jettison
pumps are selected off, the amber pump low
pressure lights on the Flight Engineer’s panel
should illuminate and remain on. If a pump
low pressure light on the Flight Engineer’s
panel does not illuminate, open the
associated pump circuit breaker.’’
Note 3: When a statement identical to that
in paragraph (i) 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.
DEPARTMENT OF TRANSPORTATION
No Alternative Inspections or Inspection
Intervals
(j) After accomplishing the action specified
in paragraph (h) of this AD, no alternative
inspections or inspection intervals may be
used unless the inspections or inspection
intervals are approved as an AMOC in
accordance with the procedures specified in
paragraph (l) of this AD.
jlentini on DSKJ8SOYB1PROD with PROPOSALS
Terminating Action for Maintenance
Program Revision
(k) Incorporating AWL No. 28–AWL–22
into the maintenance program in accordance
with paragraph (g) of AD 2008–10–07,
Amendment 39–15513, or AD 2008–10–07
R1, Amendment 39–16070, terminates the
action required by paragraph (h) of this AD.
Alternative Methods of Compliance
(AMOCs)
(l)(1) The Manager, Seattle Aircraft
Certification Office (ACO), FAA, has the
authority to approve AMOCs for this AD, if
requested using the procedures found in 14
CFR 39.19. Send information to ATTN:
Douglas Bryant, Aerospace Engineer,
Propulsion Branch, ANM–140S, FAA, Seattle
ACO, 1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone (425)
917–6505; fax (425) 917–6590. Information
may be e-mailed to: 9-ANM-Seattle-ACOAMOC-Requests@faa.gov.
(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 principal maintenance inspector
(PMI) or principal avionics inspector (PAI),
as appropriate, or lacking a principal
inspector, your local Flight Standards District
VerDate Mar<15>2010
16:54 Sep 30, 2010
Jkt 223001
Issued in Renton, Washington, on
September 20, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 2010–24717 Filed 9–30–10; 8:45 am]
BILLING CODE 4910–13–P
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2010–0953; Directorate
Identifier 2010–NM–010–AD]
RIN 2120–AA64
Airworthiness Directives; McDonnell
Douglas Corporation Model MD–90–30
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for all
Model MD–90–30 airplanes. This
proposed AD would require repetitive
high frequency eddy current inspections
for cracking on the hinge bearing lugs of
the left and right sides of the center
section ribs of the horizontal stabilizer,
and related investigative and corrective
actions if necessary. This proposed AD
results from reports of cracks found on
either the left or right (or in one case,
both) sides of the center section ribs of
the horizontal stabilizer. We are
proposing this AD to detect and correct
cracking in the hinge bearing lugs of the
center section of the left and right ribs,
which could result in failure of the
hinge bearing lugs and consequent
inability of the horizontal stabilizer to
sustain the required loads.
DATES: We must receive comments on
this proposed AD by November 15,
2010.
SUMMARY:
You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: 202–493–2251.
• 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.
• Hand Delivery: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue, SE.,
ADDRESSES:
PO 00000
Frm 00023
Fmt 4702
Sfmt 4702
60665
Washington, DC 20590, between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays.
For service information identified in
this proposed AD, contact Boeing
Commercial Airplanes, Attention: Data
& Services Management, 3855
Lakewood Boulevard, MC D800–0019,
Long Beach, California 90846–0001;
telephone 206–544–5000, extension 2;
fax 206–766–5683; e-mail
dse.boecom@boeing.com; Internet
https://www.myboeingfleet.com. You
may review copies of the referenced
service information at the FAA,
Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington.
For information on the availability of
this material at the FAA, call 425–227–
1221.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Management Facility between 9
a.m. and 5 p.m., Monday through
Friday, except Federal holidays. The AD
docket contains this proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Office
(telephone 800–647–5527) is in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT:
Roger Durbin, Aerospace Engineer,
Airframe Branch, ANM–120L, FAA, Los
Angeles Aircraft Certification Office
(ACO), 3960 Paramount Boulevard,
Lakewood, California 90712–4137;
telephone (562) 627–5233; fax (562)
627–5210.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written
relevant data, views, or arguments about
this proposed AD. Send your comments
to an address listed under the
ADDRESSES section. Include ‘‘Docket No.
FAA–2010–0953; Directorate Identifier
2010–NM–010–AD’’ at the beginning of
your comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this proposed AD.
E:\FR\FM\01OCP1.SGM
01OCP1
]]>Agencies
[Federal Register Volume 75, Number 190 (Friday, October 1, 2010)]
[Proposed Rules]
[Pages 60661-60665]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-24717]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2008-1098; Directorate Identifier 2008-NM-108-AD]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Model 747-100, 747-
100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and
747SP Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of
comment period.
-----------------------------------------------------------------------
SUMMARY: We are revising an earlier proposed airworthiness directive
(AD) for certain Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-
200C, 747-200F, 747-300, 747SR, and 747SP series airplanes. The
original NPRM would have required adding two new indicator lights on
the P10 panel to inform the captain and first officer of a low pressure
condition in the left and right override/jettison pumps of the center
wing tanks. The original NPRM would also have required replacing the
left and right override/jettison switches on the M154 fuel control
module on the P4 panel with improved switches and doing the associated
wiring changes. The original NPRM would have also required a revision
to the maintenance program to incorporate airworthiness limitation No.
28-AWL-22. The original NPRM resulted from fuel system reviews
conducted by the manufacturer. This action revises the original NPRM by
adding a revision to the airplane flight manual to advise the
flightcrew what to do in the event that the pump low pressure light on
the flight engineer's panel does not illuminate when the pump is
selected off; and requiring, for certain airplanes, installation of a
mounting bracket for the new indicator lights. We are proposing this
supplemental NPRM to prevent uncommanded operation of the override/
jettison pumps of the center wing tanks, and failure to manually shut
off the override/jettison pumps at the correct time, either of which
could lead to an ignition source inside the center wing tank. This
condition, in combination with flammable fuel vapors, could result in a
center fuel tank explosion and consequent loss of the airplane.
DATES: We must receive comments on this supplemental NPRM by October
26, 2010.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
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.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management,
P.O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-
544-5000, extension 1; fax 206-766-5680; e-mail me.boecom@boeing.com;
Internet https://www.myboeingfleet.com. You may review copies of the
referenced service information at the FAA, Transport Airplane
Directorate, 1601 Lind Avenue, SW., Renton, Washington. For information
on the availability of this material at the FAA, call 425-227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (telephone 800-647-5527) is in the
ADDRESSES section. Comments will be available in the AD docket shortly
after receipt.
FOR FURTHER INFORMATION CONTACT: Douglas Bryant, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 917-6505; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2008-1098;
Directorate Identifier 2008-NM-108-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
[[Page 60662]]
Discussion
We issued a notice of proposed rulemaking (NPRM) (the ``original
NPRM'') to amend 14 CFR part 39 to include an airworthiness directive
(AD) that would apply to certain Model 747-100, 747-100B, 747-100B SUD,
747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series
airplanes. That original NPRM was published in the Federal Register on
October 16, 2008 (73 FR 61369). That original NPRM proposed to require
adding two new indicator lights on the P10 panel to inform the captain
and first officer of a low pressure condition in the left and right
override/jettison pumps of the center wing tanks. The original NPRM
also proposed to require replacing the left and right override/jettison
switches on the M154 fuel control module on the P4 panel with improved
switches and doing the associated wiring changes. The original NPRM
also proposed to require a revision to the maintenance program to
incorporate airworthiness limitation No. 28-AWL-22.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comments received from the two commenters.
Request To Revise the Airplane Flight Manual (AFM)
Boeing requests that the original NPRM be revised to add a
requirement to revise Section 3, ``Normal Procedures,'' of the AFM to
require actions by the flight engineer in the event that the pump low
pressure light on the flight engineer's panel does not illuminate when
the pump is selected off.
We agree that this supplemental NPRM should be revised to require
including this information in the AFM. However, we disagree with the
specific wording and AFM section proposed by Boeing. In evaluating
Boeing's request, we found that there are two causes for an override/
jettison pump to run dry. The actions proposed by the original NPRM
were intended to prevent an uncommanded-on event that could result in
the override/jettison pump running dry, which could lead to an ignition
source in the center wing fuel tank. We found that the original
proposed actions would address events where the pumps run dry for
extended periods of time as might happen when the flight engineer does
not shut off the pump at the appropriate time.
However, since the cause of the uncommanded-on event still exists,
we find that the AFM must be revised to provide instructions to the
flightcrew in the event of a relay failure which leaves the fuel pump
powered on after the pump has been switched off (uncommanded-on). We
have determined that more precise wording must be used in the
supplemental NPRM and that the wording should be added to Section 1,
``Certificate Limitations,'' of the AFM.
Therefore, we have added a new paragraph (i) to this supplemental
NPRM and re-identified subsequent paragraphs. We have also revised the
Costs of Compliance section of this supplemental NPRM to include the
estimated costs for this new action. In addition, we revised the unsafe
condition statement to include the additional cause.
Request To Reference Later Revision of Service Bulletin Cited in
Original NPRM
Northwest Airlines (NWA) requests that we reference updated service
information (i.e., Boeing Service Bulletin 747-28A2288, Revision 1,
dated January 21, 2010), instead of Boeing Alert Service Bulletin 747-
28A2288, dated March 20, 2008, which was referenced in the original
NPRM as the appropriate source of service information for doing the
required actions. NWA notes that steps 3.B.46.b.(1) through
3.B.46.b.(11) of Boeing Alert Service Bulletin 747-28A2288, dated March
20, 2008, do not state when the two new installed LOW PRESS lights on
the P10 panel come on. NWA explains that if the LOW PRESS lights on the
P10 panel are not wired correctly, and those steps are used, the lights
could be illuminated properly in the `Test' mode, but might not
illuminate in the actual non-`test' mode with the override/jettison
pump switch in the ON position. NWA states that Boeing responded to
this concern and stated that the original issue of the alert service
bulletin would be revised and would reference actions that are the same
as those provided in AWL No. 28-AWL-22 for the functional tests.
Since we published the original NPRM, Boeing has published Boeing
Service Bulletin 747-28A2288, Revision 1, dated January 21, 2010. We
agree to reference the updated service bulletin as the appropriate
source of service information for accomplishing the installation of
indicator lights and replacement of switches required by this
supplemental NPRM. Boeing has clarified Steps 3.B.44.b.(1) through
3.B.44.b.(11) of Boeing Service Bulletin 747-28A2288, Revision 1, dated
January 21, 2010.
In addition, Boeing has also included installation instructions
(which include installing a mounting bracket) of the LOW PRESS
indicator lights for airplanes that do not have the warning panel
(i.e., the P10 panel) installed, and revised the airplane groups.
We have revised paragraphs (c) and (g) of this supplemental NPRM to
reference Boeing Service Bulletin 747-28A2288, Revision 1, dated
January 21, 2010. For certain airplanes, we also revised paragraph (g)
of this supplemental NPRM to require adding a mounting bracket.
Request To Revise Summary and Discussion Sections of Original NPRM
Boeing requests that we revise the Summary and Discussion sections
of the original NPRM to add additional detail to the description of
required actions.
For the Summary section, Boeing suggests that the text be revised
to point out:
The redundancy in functionality between the two P4 panel
indicator lights and the new indicator lights added to the P10 panel;
The different configurations of the P10 panel (which means
that for some airplanes, a bracket would also be installed to provide a
mounting surface for the new indicator lights); and
To explain which flightcrew member is responsible for
responding to indications of a pump uncommanded-on event.
For the Discussion section, Boeing also suggests that the text be
revised to point out the redundancy in functionality between the two P4
panel indicator lights and the new indicator lights added to the P10
panel. Boeing suggests that, in addition, the text should be revised to
provide further details on the similarities and differences between the
indicator lights on the P10 and P4 panels; information on a switch
replacement for the P4 panel; and further detail on how and when the
indicator lights turn on and off along with a detailed description of
how a flight engineer should respond to the indicator lights.
We agree that the sections of text need to be clarified. The
Summary section of an AD is intended to provide only a brief summary of
the AD. Therefore, we have not revised the Summary section of this
supplemental NPRM. Also, while the Discussion section is the
appropriate section for the detailed information that Boeing proposes,
the Discussion section from the original NPRM is not repeated in this
supplemental NPRM.
[[Page 60663]]
Request To Revise the Work-Hour Estimate
NWA requests that the work-hour estimate to accomplish the original
NPRM be increased from the 28 work-hours estimated in the original NPRM
to 56.75 work-hours. NWA states that Boeing Alert Service Bulletin 747-
28A2288, dated March 20, 2008, does not include a work-hour estimate
for accomplishing access and closeup actions provided in BAE Service
Bulletin 65B46124-28-03, dated March 28, 2007. NWA points out that the
BAE service bulletins, referenced in the original NPRM (and the
following table) as additional sources of guidance, provide an estimate
of 10 work-hours for access and closeup actions.
BAE Systems Service Bulletins
------------------------------------------------------------------------
BAE Systems Service Bulletin-- Dated--
------------------------------------------------------------------------
65B46124[dash]28[dash]01............. February 16, 2006.
65B46124[dash]28[dash]02............. March 28, 2007.
65B46124[dash]28[dash]03............. March 28, 2007.
65B46214[dash]28[dash]01............. February 16, 2006.
65B46214[dash]28[dash]02............. March 28, 2007.
65B46214[dash]28[dash]03............. March 28, 2007.
------------------------------------------------------------------------
We agree to revise the work-hour estimate. However, we do not agree
to include incidental costs such as access and closeup. Boeing Service
Bulletin 747-28A2288, Revision 1, dated January 21, 2010, provides an
estimate of 28 work-hours to accomplish the proposed modification. The
BAE service bulletins referenced in that Boeing service bulletin as
additional sources of guidance each provide an estimate of 2 additional
work-hours to accomplish the modification actions specified in Boeing
Service Bulletin 747-28A2288, Revision 1, dated January 21, 2010. The
cost analysis in AD rulemaking actions, however, typically does not
include incidental costs such as the time required to gain access and
closeup, time necessary for planning, or time necessitated by other
administrative actions. Those incidental costs, which might vary
significantly among operators, are almost impossible to calculate. We
cannot provide specific information regarding the cost of parts from
BAE to do the proposed modification. The parts costs will likely vary
depending on the airplane group. However, we can reasonably estimate
that the cost of the parts from BAE will be at least between $100 and
$200 per airplane, depending on airplane group. We specifically invite
the submission of comments and other data regarding the costs of this
proposed AD.
We have revised the estimate to between 30 and 32 work-hours,
depending on airplane group. Also, Boeing Service Bulletin 747-28A2288,
Revision 1, dated January 21, 2010, revises the parts cost estimate
provided in the original issue of that service bulletin. We have
revised the parts costs estimate in the Costs of Compliance section of
this supplemental NPRM accordingly.
Incorrect Numbers
AWL No. 28-AWL-22 of Section D of the Boeing 747-100/200/300/SP
Airworthiness Limitations (AWLs) and Certification Maintenance
Requirements (CMRs), D6-13747-CMR, Revision March 2008, contains an
incorrect section number. Where the AWL states ``28-31-00,'' the
correct section number is ``28-42-00.'' Boeing is aware of this
discrepancy and plans to issue a revision. We have included this
information in paragraph (h) of this AD.
Boeing Service Bulletin 747-28A2288, Revision 1, dated January 21,
2010, contains an incorrect sub-section number and incorrect part
numbers. Where Boeing Service Bulletin 747-28A2288, Revision 1, dated
January 21, 2010, states ``20-60-00,'' the correct sub-section number
is ``28-60-06.'' Where Figures 22 through 32 of Boeing Service Bulletin
747-28A2288, Revision 1, dated January 21, 2010, state certain part
numbers for a nut, a bolt, and a washer (BACN10JC06CD, BACS12HN06-10,
and NAS1149D0632J respectively), the correct part numbers are
BACN10NW1, BACS12HN04-6 (for a screw instead of a bolt), and
NAS1149DN416J, respectively. Boeing is aware of these discrepancies and
plans to issue a revision. We have included this information in
paragraph (g) of this AD.
FAA's Determination and Proposed Requirements of the Supplemental NPRM
We are proposing this supplemental NPRM because we evaluated all
pertinent information and determined an unsafe condition exists and is
likely to exist or develop on other products of the same type design.
Certain changes described above expand the scope of the original NPRM.
As a result, we have determined that it is necessary to reopen the
comment period to provide additional opportunity for the public to
comment on this supplemental NPRM.
Costs of Compliance
We estimate that this proposed AD would affect 185 airplanes of
U.S. registry. The average labor rate per work-hour is $85. The
following table provides the estimated costs for U.S. operators to
comply with this proposed AD.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Number of U.S.-
Action Work-hours Parts Cost per registered Fleet cost
product airplanes
----------------------------------------------------------------------------------------------------------------
Boeing Service Bulletin 747- Between 30 and Between $2,768 Between $5,318 185 Between
28A2288, Revision 1. 32. and $2,868. and $5,588. $983,830 and
$1,033,780.
AFM revision................ 1.............. None........... $85 185 $15,725
----------------------------------------------------------------------------------------------------------------
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 determined that this proposed AD would not have federalism
implications under Executive Order 13132. This
[[Page 60664]]
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 this 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.
You can find our regulatory evaluation and the estimated costs of
compliance in the AD Docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, 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 FAA amends Sec. 39.13 by adding the following new AD:
The Boeing Company: Docket No. FAA-2008-1098; Directorate Identifier
2008-NM-108-AD.
Comments Due Date
(a) We must receive comments by October 26, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to The Boeing Company 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 Service Bulletin 747-28A2288, Revision 1, dated
January 21, 2010.
Note 1: This AD requires revisions to certain operator
maintenance documents to include a new inspection. Compliance with
this inspection is required by 14 CFR 91.403(c). For airplanes that
have been previously modified, altered, or repaired in the areas
addressed by this inspection, 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 (AMOC)
according to paragraph (1) of this AD. The request should include a
description of changes to the required inspection that will ensure
the continued operational safety of the airplane.
Subject
(d) Air Transport Association (ATA) of America Code 28: Fuel.
Unsafe Condition
(e) This AD results from fuel system reviews conducted by the
manufacturer. The Federal Aviation Administration is issuing this AD
to prevent uncommanded operation of the override/jettison pumps of
the center wing tanks, and failure to manually shut off the
override/jettison pumps at the correct time, either of which could
lead to an ignition source inside the center wing tank. This
condition, in combination with flammable fuel vapors, could result
in a center fuel tank explosion and consequent loss of the airplane.
Compliance
(f) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Installation of Indicator Lights and Replacement of Switches
(g) Within 36 months after the effective date of this AD: Add
two new indicator lights on the P10 panel to inform the captain and
first officer of a low pressure condition in the left and right
override/jettison pumps of the center wing tanks; and, for airplanes
that do not have the warning panel (P10 panel) installed, add a
mounting bracket; and replace the left and right override/jettison
switches on the M154 fuel control module on the P4 panel with
improved switches; and do the associated wiring changes. Accomplish
these actions by doing all of the applicable actions specified in
the Accomplishment Instructions of Boeing Service Bulletin 747-
28A2288, Revision 1, dated January 21, 2010, except where that
service bulletin states ``20-60-00,'' the correct sub-section number
is ``28-60-06,'' and as described in Table 1 of this AD.
Table 1--Part Number Correction
----------------------------------------------------------------------------------------------------------------
Part number specified in
Figures 22 through 32 of
Part name Boeing Service Bulletin Part name of correct Correct part number
747-28A2288, Revision 1, part
dated January 21, 2010
----------------------------------------------------------------------------------------------------------------
Nut.............................. BACN10JC06CD............. Nut................. BACN10NW1
Bolt............................. BACS12HN06-10............ Screw............... BACS12HN04-6
Washer........................... NAS1149D0632J............ Washer.............. NAS1149DN416J
----------------------------------------------------------------------------------------------------------------
Note 2: For airplanes equipped with certain M154 fuel control
modules, paragraph 2.C.2 of Boeing Service Bulletin 747-28A2288,
Revision 1, dated January 21, 2010, refers to the BAE Systems
service bulletins identified in Table 2 of this AD, as applicable,
as additional sources of guidance for replacing the switches.
Table 2--Additional Sources of Guidance
------------------------------------------------------------------------
Service bulletin Date
------------------------------------------------------------------------
BAE Systems Service Bulletin February 16, 2006.
65B46124[dash]28[dash]01.
BAE Systems Service Bulletin March 28, 2007.
65B46124[dash]28[dash]02.
BAE Systems Service Bulletin March 28, 2007.
65B46124[dash]28[dash]03.
BAE Systems Service Bulletin February 16, 2006.
65B46214[dash]28[dash]01.
BAE Systems Service Bulletin March 28, 2007.
65B46214[dash]28[dash]02.
BAE Systems Service Bulletin March 28, 2007.
65B46214[dash]28[dash]03.
------------------------------------------------------------------------
[[Page 60665]]
Maintenance Program Revision
(h) Concurrently with accomplishing the actions required by
paragraph (g) of this AD, revise the maintenance program by
incorporating Airworthiness Limitation (AWL) No. 28-AWL-22 of
Section D of the Boeing 747-100/200/300/SP Airworthiness Limitations
(AWLs) and Certification Maintenance Requirements (CMRs), D6-13747-
CMR, Revision March 2008. Where the AWL states ``28-31-00,'' the
correct section number is ``28-42-00.''
Airplane Flight Manual (AFM) Revision
(i) Concurrently with accomplishing the actions required by
paragraph (g) of this AD, revise Section 1, ``Certificate
Limitations,'' of the applicable Boeing 747 AFM to include the
following statement. This may be done by inserting a copy of this AD
into the AFM.
``When the center tank override jettison pumps are selected off,
the amber pump low pressure lights on the Flight Engineer's panel
should illuminate and remain on. If a pump low pressure light on the
Flight Engineer's panel does not illuminate, open the associated
pump circuit breaker.''
Note 3: When a statement identical to that in paragraph (i) 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.
No Alternative Inspections or Inspection Intervals
(j) After accomplishing the action specified in paragraph (h) of
this AD, no alternative inspections or inspection intervals may be
used unless the inspections or inspection intervals are approved as
an AMOC in accordance with the procedures specified in paragraph (l)
of this AD.
Terminating Action for Maintenance Program Revision
(k) Incorporating AWL No. 28-AWL-22 into the maintenance program
in accordance with paragraph (g) of AD 2008-10-07, Amendment 39-
15513, or AD 2008-10-07 R1, Amendment 39-16070, terminates the
action required by paragraph (h) of this AD.
Alternative Methods of Compliance (AMOCs)
(l)(1) The Manager, Seattle Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. Send information to
ATTN: Douglas Bryant, Aerospace Engineer, Propulsion Branch, ANM-
140S, FAA, Seattle ACO, 1601 Lind Avenue, SW., Renton, Washington
98057-3356; telephone (425) 917-6505; fax (425) 917-6590.
Information may be e-mailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
(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 principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as appropriate, or lacking a
principal inspector, your local Flight Standards District Office.
The AMOC approval letter must specifically reference this AD.
Issued in Renton, Washington, on September 20, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-24717 Filed 9-30-10; 8:45 am]
BILLING CODE 4910-13-P
