Airworthiness Directives; McDonnell Douglas Model DC-10-10 and DC-10-10F Airplanes; and Model MD-10-10F Airplanes, 33663-33665 [E6-9063]
Download as PDF
Federal Register / Vol. 71, No. 112 / Monday, June 12, 2006 / Proposed Rules
Issued in Renton, Washington, on May 31,
2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. E6–9061 Filed 6–9–06; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2006–24999; Directorate
Identifier 2006–NM–060–AD]
RIN 2120–AA64
Airworthiness Directives; McDonnell
Douglas Model DC–10–10 and DC–10–
10F Airplanes; and Model MD–10–10F
Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
wwhite on PROD1PC61 with PROPOSALS
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain McDonnell Douglas Model DC–
10–10 and DC–10–10F airplanes; and
Model MD–10–10F airplanes. This
proposed AD would require replacing
the clamp bases for the fuel vent pipe
with improved clamp bases. This
proposed AD results from reports that
the foil wrapping on existing plastic
clamp bases has migrated out of
position, which compromises the
bonding of the fuel vent pipes to the
airplane structure. We are proposing
this AD to ensure that the fuel vent
pipes are properly bonded to the
airplane structure. Improper bonding
could prevent electrical energy from a
lightning strike from dissipating to the
airplane structure, and create an
ignition source, which could result in a
fuel tank explosion.
DATES: We must receive comments on
this proposed AD by July 27, 2006.
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: Docket Management Facility,
U.S. Department of Transportation, 400
Seventh Street, SW., Nassif Building,
room PL–401, Washington, DC 20590.
VerDate Aug<31>2005
20:57 Jun 09, 2006
Jkt 208001
• Fax: (202) 493–2251.
• Hand Delivery: Room PL–401 on
the plaza level of the Nassif Building,
400 Seventh Street, SW., Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
Contact Boeing Commercial
Airplanes, Long Beach Division, 3855
Lakewood Boulevard, Long Beach,
California 90846, Attention: Data and
Service Management, Dept. C1–L5A
(D800–0024), for the service information
identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: Serj
Harutunian, Aerospace Engineer,
Propulsion Branch, ANM–140L, FAA,
Los Angeles Aircraft Certification
Office, 3960 Paramount Boulevard,
Lakewood, California 90712–4137;
telephone (562) 627–5254; fax (562)
627–5210.
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–2006–24999; Directorate
Identifier 2006–NM–060–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 Management
Facility office between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays. The Docket
Management Facility office (telephone
(800) 647–5227) is located on the plaza
PO 00000
Frm 00006
Fmt 4702
Sfmt 4702
33663
level of the Nassif 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’’ (67 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 AD are necessary to
reduce the potential of ignition sources
inside fuel tanks, which, in combination
E:\FR\FM\12JNP1.SGM
12JNP1
33664
Federal Register / Vol. 71, No. 112 / Monday, June 12, 2006 / Proposed Rules
with flammable fuel vapors, could result
in fuel tank explosions and consequent
loss of the airplane.
Foil-wrapped plastic clamp bases are
used to bond the fuel vent pipes to the
airplane structure in parts of the fuel
vent system on McDonnell Douglas
Model DC–10–10 and DC–10–10F
airplanes; and Model MD–10–10F
airplanes. We have received reports that
the foil wrapping on existing plastic
clamp bases has migrated out of
position on several airplanes, which
compromises the bonding of the fuel
vent pipes to the airplane structure.
(Bonding of the fuel vent pipes to the
airplane structure is critical to ensure
that the electrical energy from a
lightning strike dissipates to the
airplane structure.) This condition, if
not corrected, could create an ignition
source and result in a fuel tank
explosion.
Relevant Service Information
We have reviewed Boeing Service
Bulletin DC10–28–243, dated February
22, 2005. The service bulletin describes
procedures for replacing existing foilwrapped plastic clamp bases for the fuel
vent pipe with improved metal clamp
bases. These replacement procedures
include verifying the electrical
conductivity of the structural bracket
and vent pipe surfaces and performing
corrective action if necessary. The
corrective action includes prepping and
applying chemical conversion coating to
the surface of the structural bracket and/
or vent pipe, as applicable.
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
accomplishing the actions specified in
the service information described
previously.
wwhite on PROD1PC61 with PROPOSALS
Costs of Compliance
There are about 12 airplanes of the
affected design in the worldwide fleet.
This proposed AD would affect about 12
airplanes of U.S. registry. The proposed
actions would take about 2 work hours
per airplane, at an average labor rate of
$80 per work hour. Required parts
would cost about $502 per airplane.
Based on these figures, the estimated
cost of the proposed AD for U.S.
VerDate Aug<31>2005
20:57 Jun 09, 2006
Jkt 208001
operators is $7,944, or $662 per
airplane.
PART 39—AIRWORTHINESS
DIRECTIVES
Authority for This Rulemaking
1. The authority citation for part 39
continues to read as follows:
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:
PO 00000
Frm 00007
Fmt 4702
Sfmt 4702
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):
McDonnell Douglas: Docket No. FAA–2006–
24999; Directorate Identifier 2006–NM–
060–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by July 27, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to McDonnell Douglas
Model DC–10–10 and DC–10–10F airplanes;
and Model MD–10–10F airplanes,
certificated in any category; as identified in
Boeing Service Bulletin DC10–28–243, dated
February 22, 2005.
Unsafe Condition
(d) This AD results from reports that the
foil wrapping on existing plastic clamp bases
has migrated out of position, which
compromises the bonding of the fuel vent
pipes to the airplane structure. We are
issuing this AD to ensure that the fuel vent
pipes are properly bonded to the airplane
structure. Improper bonding could prevent
electrical energy from a lightning strike from
dissipating to the airplane structure, and
create an ignition source, which could result
in a fuel tank explosion.
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.
Clamp Base Replacement
(f) Within 60 months after the effective
date of this AD: Replace the existing plastic
clamp bases for the fuel vent pipe with
improved metal clamp bases, by doing all of
the applicable actions as specified in the
Accomplishment Instructions of Boeing
Service Bulletin DC10–28–243, dated
February 22, 2005. All corrective actions that
are required following the conductivity
verification, which is included in the
replacement procedures, must be done before
further flight.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Los Angeles 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) Before using any AMOC approved in
accordance with § 39.19 on any airplane to
which the AMOC applies, notify the
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12JNP1
Federal Register / Vol. 71, No. 112 / Monday, June 12, 2006 / Proposed Rules
appropriate principal inspector in the FAA
Flight Standards Certificate Holding District
Office.
Issued in Renton, Washington, on June 5,
2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. E6–9063 Filed 6–9–06; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 71
[Docket No. FAA–2006–24317; Airspace
Docket No. 06–AEA–006]
Establishment of Class E Airspace;
Robert Packer Hospital, Sayre, PA
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking.
AGENCY:
SUMMARY: This notice proposes to
establish Class E airspace at Robert
Packer Hospital, Sayre, PA. The
development of an Area Navigation
(RNAV) Standard Instrument Approach
Procedure (SIAP) and Helicopter RNAV
(GPS) 135 approach for the Robert
Packer Hospital to serve flights
operating into the airport during
Instrument Flight Rules (IFR) conditions
makes this action necessary. Controlled
airspace extending upward from 700
feet Above Ground Level (AGL) is
needed to contain aircraft executing an
approach. The area would be depicted
on aeronautical charts for pilot
reference.
Comments must be received on
or before July 12, 2006.
ADDRESSES: Send comments on the
proposal in triplicate to: Manager,
Airspace Branch, AEA–520, Docket No.
FAA–2006–24317; Airspace Docket No.
06–AEA–006, FAA Eastern Region, 1
Aviation Plaza, Jamaica, NY 11434–
4809.
The official docket may be examined
in the Office of the Regional Counsel,
AEA–7, FAA Eastern Region, 1 Aviation
Plaza, Jamaica, NY 11434–4809.
An informal docket may also be
examined during normal business hours
in the Airspace Branch, AEA–520, FAA
Eastern Region, 1 Aviation Plaza,
Jamaica, NY 11434–4809.
FOR FURTHER INFORMATION CONTACT: Mr.
Francis T. Jordan, Jr., Airspace
Specialist, Airspace Branch, AEA–520,
FAA Eastern Region, 1 Aviation Plaza,
Jamaica, NY, 11434–4809; telephone:
(718) 553–4521.
wwhite on PROD1PC61 with PROPOSALS
DATES:
VerDate Aug<31>2005
20:57 Jun 09, 2006
Jkt 208001
SUPPLEMENTARY INFORMATION:
Comments Invited
Interested parties are invited to
participate in this proposed rulemaking
by submitting such written data, views,
or arguments as they may desire.
Comments that provide the factual basis
supporting the views and suggestions
presented are particularly helpful in
developing reasoned regulatory
decisions on the proposal. Comments
are specifically invited on the overall
regulatory, economic, environmental,
and energy-related aspects of the
proposal. Communications should
identify the airspace docket number and
be submitted in triplicate to the address
listed above. Commenters wishing the
FAA to acknowledge receipt of their
comments on this notice must submit
with those comments a self-addressed,
stamped postcard on which the
following statement is made:
‘‘Comments to Docket No. FAA–2006–
24317; Airspace Docket No. 06–AEA–
006’’. The postcard will be date/time
stamped and returned to the
commenter. All communications
received on or before the closing date
for comments will be considered before
taking action on the proposed rule. The
proposal contained in this notice may
be changed in light of comments
received. All comments submitted will
be available for examination in the
Rules Docket closing both before and
after the closing date for comments. A
report summarizing each substantive
public contact with the FAA personnel
concerned with this rulemaking will be
filed in the docket.
Availability of NPRMs
Any person may obtain a copy of this
Notice of Proposed Rulemaking (NPRM)
by submitting a request to the Office of
the Regional Counsel, AEA–7, FAA
Eastern Region, 1 Aviation Plaza,
Jamaica, NY 11434–4809.
Communications must identify the
notice number of this NPRM. Persons
interested in being placed on a mailing
list for future NPRMs should also
request a copy of Advisory Circular No.
11–2A, which describes the application
procedure.
The Proposal
The FAA is considering an
amendment to part 71 of the Federal
Aviation Regulations (14 CFR part 71) to
establish Class E airspace area at Robert
Packer Hospital, PA. The development
of SIAPs to serve flights operating into
the airport during IFR conditions makes
this action necessary. Controlled
airspace extending upward from 700
feet AGL is needed to accommodate the
PO 00000
Frm 00008
Fmt 4702
Sfmt 4702
33665
SIAPs. Class E airspace designations for
airspace areas extending upward from
700 feet or more above the surface are
published in Paragraph 6005 of FAA
Order 7400.9N, dated September 1,
2005, and effective September 16, 2005,
which is incorporated by reference in 14
CFR 71.1. The Class E airspace
designation listed in this document
would be published subsequently in the
Order.
The FAA has determined that this
proposed regulation only involves an
established body of technical
regulations for which frequent and
routine amendments are necessary to
keep them operationally current.
Therefore, this proposed regulation (1)
is not a ‘‘significant regulatory
action’’under Executive Order 12866; (2)
is not a ‘‘significant rule’’ under DOT
Regulation Policies and Procedures (44
FR 11034; February 26, 1979); and (3)
does not warrant preparation of a
regulatory evaluation as the anticipated
impact is so minimal. Since this is a
routine matter that would affect air
traffic procedures and air navigation, it
is certified that this proposed rule
would not have significant economic
impact on a substantial number of small
entities under the criteria of the
Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 71
Airspace, Incorporation by reference,
Navigation (air).
The Proposed Amendment
In consideration of the foregoing, the
Federal Aviation Administration
proposes to amend 14 CFR part 71 as
follows:
PART 71—[AMENDED]
1. The authority citation for 14 CFR
part 71 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40103, 40113,
40120; EO 10854, 24 FR 9565, 3 CFR, 1959–
1963 Comp., P. 389.
§ 71.1
[Amended]
2. The incorporation by reference in
14 CFR 71.1 of Federal Aviation
Administration Order 7400.9N dated
September 1, 2005, and effective
September 16, 2005, is proposed to be
amended as follows:
Paragraph 6005 Class E airspace areas
extending upward from 700 feet or more
above the surface of the earth.
AEA PA E5 Robert Packer Hospital, [New]
Sayre, Pennsylvania
(Lat. 41°58′46″ N., long. 76° 31′15″ W.)
That airspace extending upward from 700
feet above the surface within a 6.0 mile
radius of the Robert Packer Hospital, Sayre,
PA.
E:\FR\FM\12JNP1.SGM
12JNP1
Agencies
[Federal Register Volume 71, Number 112 (Monday, June 12, 2006)]
[Proposed Rules]
[Pages 33663-33665]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E6-9063]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-24999; Directorate Identifier 2006-NM-060-AD]
RIN 2120-AA64
Airworthiness Directives; McDonnell Douglas Model DC-10-10 and
DC-10-10F Airplanes; and Model MD-10-10F 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 certain McDonnell Douglas Model DC-10-10 and DC-10-10F airplanes;
and Model MD-10-10F airplanes. This proposed AD would require replacing
the clamp bases for the fuel vent pipe with improved clamp bases. This
proposed AD results from reports that the foil wrapping on existing
plastic clamp bases has migrated out of position, which compromises the
bonding of the fuel vent pipes to the airplane structure. We are
proposing this AD to ensure that the fuel vent pipes are properly
bonded to the airplane structure. Improper bonding could prevent
electrical energy from a lightning strike from dissipating to the
airplane structure, and create an ignition source, which could result
in a fuel tank explosion.
DATES: We must receive comments on this proposed AD by July 27, 2006.
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: Docket Management Facility, U.S. Department of
Transportation, 400 Seventh Street, SW., Nassif Building, room PL-401,
Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact Boeing Commercial Airplanes, Long Beach Division, 3855
Lakewood Boulevard, Long Beach, California 90846, Attention: Data and
Service Management, Dept. C1-L5A (D800-0024), for the service
information identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: Serj Harutunian, Aerospace Engineer,
Propulsion Branch, ANM-140L, FAA, Los Angeles Aircraft Certification
Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137;
telephone (562) 627-5254; fax (562) 627-5210.
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-2006-
24999; Directorate Identifier 2006-NM-060-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 Management Facility office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif 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''
(67 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 AD are
necessary to reduce the potential of ignition sources inside fuel
tanks, which, in combination
[[Page 33664]]
with flammable fuel vapors, could result in fuel tank explosions and
consequent loss of the airplane.
Foil-wrapped plastic clamp bases are used to bond the fuel vent
pipes to the airplane structure in parts of the fuel vent system on
McDonnell Douglas Model DC-10-10 and DC-10-10F airplanes; and Model MD-
10-10F airplanes. We have received reports that the foil wrapping on
existing plastic clamp bases has migrated out of position on several
airplanes, which compromises the bonding of the fuel vent pipes to the
airplane structure. (Bonding of the fuel vent pipes to the airplane
structure is critical to ensure that the electrical energy from a
lightning strike dissipates to the airplane structure.) This condition,
if not corrected, could create an ignition source and result in a fuel
tank explosion.
Relevant Service Information
We have reviewed Boeing Service Bulletin DC10-28-243, dated
February 22, 2005. The service bulletin describes procedures for
replacing existing foil-wrapped plastic clamp bases for the fuel vent
pipe with improved metal clamp bases. These replacement procedures
include verifying the electrical conductivity of the structural bracket
and vent pipe surfaces and performing corrective action if necessary.
The corrective action includes prepping and applying chemical
conversion coating to the surface of the structural bracket and/or vent
pipe, as applicable. 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 accomplishing the actions specified in the service
information described previously.
Costs of Compliance
There are about 12 airplanes of the affected design in the
worldwide fleet. This proposed AD would affect about 12 airplanes of
U.S. registry. The proposed actions would take about 2 work hours per
airplane, at an average labor rate of $80 per work hour. Required parts
would cost about $502 per airplane. Based on these figures, the
estimated cost of the proposed AD for U.S. operators is $7,944, or $662
per airplane.
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):
McDonnell Douglas: Docket No. FAA-2006-24999; Directorate Identifier
2006-NM-060-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by July 27,
2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to McDonnell Douglas Model DC-10-10 and DC-
10-10F airplanes; and Model MD-10-10F airplanes, certificated in any
category; as identified in Boeing Service Bulletin DC10-28-243,
dated February 22, 2005.
Unsafe Condition
(d) This AD results from reports that the foil wrapping on
existing plastic clamp bases has migrated out of position, which
compromises the bonding of the fuel vent pipes to the airplane
structure. We are issuing this AD to ensure that the fuel vent pipes
are properly bonded to the airplane structure. Improper bonding
could prevent electrical energy from a lightning strike from
dissipating to the airplane structure, and create an ignition
source, which could result in a fuel tank explosion.
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.
Clamp Base Replacement
(f) Within 60 months after the effective date of this AD:
Replace the existing plastic clamp bases for the fuel vent pipe with
improved metal clamp bases, by doing all of the applicable actions
as specified in the Accomplishment Instructions of Boeing Service
Bulletin DC10-28-243, dated February 22, 2005. All corrective
actions that are required following the conductivity verification,
which is included in the replacement procedures, must be done before
further flight.
Alternative Methods of Compliance (AMOCs)
(g)(1) The Manager, Los Angeles 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) Before using any AMOC approved in accordance with Sec.
39.19 on any airplane to which the AMOC applies, notify the
[[Page 33665]]
appropriate principal inspector in the FAA Flight Standards
Certificate Holding District Office.
Issued in Renton, Washington, on June 5, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E6-9063 Filed 6-9-06; 8:45 am]
BILLING CODE 4910-13-P