Document ID: FAA-2010-1158-0004
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: Boeing Co. Model 747 Airplanes
Posted Date: 2011-07-15T04:00Z

[Federal Register Volume 76, Number 136 (Friday, July 15, 2011)]
[Rules and Regulations]
[Pages 41659-41662]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-17404]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1158; Directorate Identifier 2010-NM-125-AD; 
Amendment 39-16750; AD 2011-15-03]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Model 747 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: We are superseding an existing airworthiness directive (AD) 
that applies to the products listed above. That AD currently requires 
repetitive inspections to detect damage of the sleeving and wire 
bundles of the boost pumps of the numbers 1 and 4 main fuel tanks, and 
of the auxiliary tank jettison pumps (if installed); replacement of any 
damaged sleeving with new sleeving; and repair or replacement of any 
damaged wires with new wires. For airplanes on which any burned wires 
are found, that AD also requires an inspection to detect damage of the 
conduit, and replacement of any damaged conduit with a serviceable 
conduit. This new AD reduces the initial compliance time and repetitive 
inspection interval in the existing AD. This AD was prompted by fleet 
information indicating that the repetitive inspection interval in the 
existing AD is too long because excessive chafing of the sleeving 
continues to occur much earlier than expected between scheduled 
inspections. We are issuing this AD to detect and correct abrasion of 
the Teflon sleeving and wires in the bundles of the fuel boost pumps 
for the numbers 1 and 4 main fuel tanks and of the auxiliary tank 
jettison pumps (if installed), which could result in electrical arcing 
between the wires and aluminum conduit and consequent fire or explosion 
of the fuel tank.

DATES: This AD is effective August 19, 2011.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of August 19, 
2011.

ADDRESSES: For service information identified in this 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 98057-3356. 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 http://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 AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (phone: 800-647-5527) is Document Management Facility, 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room W12-140, 1200

[[Page 41660]]

New Jersey Avenue, SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Tung Tran, 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:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede an airworthiness directive (AD) 97-26-07, 
Amendment 39-10250 (62 FR 65352, December 12, 1997). That AD applies to 
the specified products. The NPRM published in the Federal Register on 
December 14, 2010 (75 FR 77793). That NPRM proposed to continue to 
require repetitive inspections to detect damage of the sleeving and 
wire bundles of the boost pumps of the numbers 1 and 4 main fuel tanks, 
and of the auxiliary tank jettison pumps (if installed); replacement of 
any damaged sleeving with new sleeving; and repair or replacement of 
any damaged wires with new wires. For airplanes on which any burned 
wires are found, that NPRM also proposed to continue to require an 
inspection to detect damage of the conduit, and replacement of any 
damaged conduit with a serviceable conduit. That NPRM proposed to 
reduce the initial compliance time and repetitive inspection interval 
in the existing AD.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comments received on the proposal 
and the FAA's response to each comment.

Request To Change Heading for Restated Requirements

    United Airlines (UA) asked that we change the heading titled 
``Restatement of Requirements of AD 96-26-06, Amendment 39-9870,'' 
which precedes paragraph (g) of the NPRM, to ``Restatement of 
Requirements of AD 97-26-07, Amendment 39-10250. UA pointed out that AD 
97-26-07 superseded AD 96-26-06.
    We agree with UA for the reason provided. Although certain 
requirements in AD 96-26-06 are carried over in AD 97-26-07--and in 
this AD--those requirements are identified by the AD number within the 
applicable paragraphs. We have changed the heading preceding paragraph 
(g) of this AD accordingly.

Request To Add Approved Alternate Method of Compliance

    UA asked that Boeing Alert Service Bulletin 747-28A2204, Revision 
2, dated September 1, 2005, be included in paragraphs (g), (i), (j), 
and (k) of the NPRM. UA stated that Boeing Alert Service Bulletin 747-
28A2204, Revision 2, dated September 1, 2005, was approved as an 
alternative method of compliance (AMOC) to the requirements of 
paragraph (a) of AD 97-26-07.
    We partially agree with UA. We agree that Revision 2, dated 
September 1, 2005, of Boeing Alert Service Bulletin 747-28A2204, was 
reviewed by the FAA, and approved as an AMOC to the requirements of 
paragraph (a) of AD 97-26-07. We do not agree that Boeing Alert Service 
Bulletin 747-28A2204, Revision 2, dated September 1, 2005, should be 
added to the requested paragraphs because those paragraphs are part of 
the restatement of the requirements of AD 97-26-07. However, we have 
added a new paragraph (p) to this AD (and reidentified subsequent 
paragraphs) to give operators credit for using Boeing Alert Service 
Bulletin 747-28A2204, Revision 2, dated September 1, 2005, to 
accomplish the specified actions.

Request To Include Terminating Action

    UA asked that terminating action be included in the NPRM. UA stated 
that it believes Boeing is developing a solution that would terminate 
the inspections required by the NPRM.
    We acknowledge the comment from UA. However, Boeing has not 
submitted a revised service bulletin with terminating action for the 
repetitive inspections. We are aware that Boeing is developing a 
solution to the wire chafing issue, but until a modification is 
approved and available we are unable to reference it in the AD. 
However, under the provisions of paragraph (q) of this AD, we will 
consider requests for accomplishing a terminating modification if data 
are submitted to substantiate that it would provide an acceptable level 
of safety. We have made no change to the AD in this regard.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
the AD with the changes described previously. We have determined that 
these changes will neither increase the economic burden on any operator 
nor increase the scope of the AD.

Costs of Compliance

    We estimate that this AD affects 215 airplanes of U.S. registry. 
The new requirements of this AD add no additional economic burden. The 
current costs for this AD are repeated below for the convenience of 
affected operators.
    The actions that are required by AD 97-26-07 and retained in this 
AD take about 4 work-hours per airplane, at an average labor rate of 
$85 per work-hour. Based on these figures, the estimated cost of the 
currently required actions is $73,100, or $340 per airplane, per 
inspection cycle.

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

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) 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.

[[Page 41661]]

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
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]

0
2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 
97-26-07, Amendment 39-10250 (62 FR 65352, December 12, 1997), and 
adding the following new AD:

2011-15-03 The Boeing Company: Amendment 39-16750; Docket No. FAA-
2010-1158; Directorate Identifier 2010-NM-125-AD.

Effective Date

    (a) This AD is effective August 19, 2011.

Affected ADs

    (b) This AD supersedes AD 97-26-07, Amendment 39-10250.

Applicability

    (c) This AD applies to all The Boeing Company Model 747-100, -
100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 
747SR, and 747SP series airplanes, certificated in any category.

Subject

    (d) Air Transport Association (ATA) of America Code 28: Fuel.

Unsafe Condition

    (e) This AD was prompted by fleet information indicating that 
the repetitive inspection interval in the existing AD is too long 
because excessive chafing of the sleeving continues to occur much 
earlier than expected between scheduled inspections. The Federal 
Aviation Administration is issuing this AD to detect and correct 
abrasion of the Teflon sleeving and wires in the bundles of the fuel 
boost pumps for the numbers 1 and 4 main fuel tanks and of the 
auxiliary tank jettison pumps (if installed), which could result in 
electrical arcing between the wires and aluminum conduit and 
consequent fire or explosion of the fuel tank.

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.

Restatement of Requirements of AD 97-26-07, Amendment 39-10250

Inspections/Repair or Replace if Necessary

    (g) Perform an initial inspection to detect damage of the 
sleeving and wire bundles of the forward and aft boost pumps of the 
numbers 1 and 4 main fuel tanks, and of the wire bundles of the 
auxiliary tank jettison pumps (if installed), in accordance with 
Boeing Alert Service Bulletin 747-28A2204, dated December 19, 1996; 
Boeing Service Bulletin 747-28A2204, Revision 1, dated October 30, 
1997; or Boeing Alert Service Bulletin 747-28A2204, Revision 3, 
dated March 11, 2010; at the time specified in paragraph (g)(1) or 
(g)(2) of this AD, as applicable. After the effective date of this 
AD, only Revision 3 of Boeing Alert Service Bulletin 747-28A2204 may 
be used.
    (1) For airplanes having line numbers 001 through 432 inclusive: 
Inspect within 120 days after January 21, 1997 (the effective date 
of AD 96-26-06, amendment 39-9870, which was superseded by AD 97-26-
07).
    (2) For airplanes having line numbers 433 and subsequent: 
Inspect at the later of the times specified in paragraphs (g)(2)(i) 
or (g)(2)(ii) of this AD.
    (i) Prior to the accumulation of 20,000 flight cycles or 60,000 
flight hours, whichever occurs first; or
    (ii) Within 120 days after December 29, 1997 (the effective date 
of AD 97-26-07).
    (h) Repeat the inspection required by paragraph (g) of this AD 
at intervals not to exceed 20,000 flight cycles or 60,000 flight 
hours since the last inspection, whichever occurs first, until the 
first inspection required by paragraph (n) of this AD has been 
accomplished.
    (i) If any damaged sleeving is found, prior to further flight, 
replace the sleeving with new sleeving, in accordance with Boeing 
Alert Service Bulletin 747-28A2204, dated December 19, 1996; Boeing 
Service Bulletin 747-28A2204, Revision 1, dated October 30, 1997; or 
Boeing Alert Service Bulletin 747-28A2204, Revision 3, dated March 
11, 2010. After the effective date of this AD, only Revision 3 of 
Boeing Alert Service Bulletin 747-28A2204 may be used.
    (j) If any damaged wire is found, prior to further flight, 
repair or replace the wire with a new wire, in accordance with 
Boeing Alert Service Bulletin 747-28A2204, dated December 19, 1996, 
Boeing Service Bulletin 747-28A2204, Revision 1, dated October 30, 
1997; or Boeing Alert Service Bulletin 747-28A2204, Revision 3, 
dated March 11, 2010. After the effective date of this AD, only 
Revision 3 of Boeing Alert Service Bulletin 747-28A2204 may be used.
    (k) If any burned wire is found, prior to further flight, 
perform an inspection to detect damage of the conduit, in accordance 
with Boeing Alert Service Bulletin 747-28A2204, dated December 19, 
1996; Boeing Service Bulletin 747-28A2204, Revision 1, dated October 
30, 1997; or Boeing Alert Service Bulletin 747-28A2204, Revision 3, 
dated March 11, 2010. If any damage is found, prior to further 
flight, replace the conduit with a serviceable conduit, in 
accordance with Boeing Alert Service Bulletin 747-28A2204, dated 
December 19, 1996; Boeing Service Bulletin 747-28A2204, Revision 1, 
dated October 30, 1997; or Boeing Alert Service Bulletin 747-
28A2204, Revision 3, dated March 11, 2010. After the effective date 
of this AD, only Revision 3 of Boeing Alert Service Bulletin 747-
28A2204 may be used.
    (l) For airplanes having line numbers 433 and subsequent: Within 
14 days after accomplishing the initial inspection required by 
paragraph (g) of this AD, submit a report of any damaged sleeving 
(i.e., holes, breaks, cuts, splits), damaged wire (i.e., worn or 
cracked insulation, exposed conductor, indication of arcing/
burning), or damaged conduit to the Manager, Seattle Aircraft 
Certification Office (ACO), FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, WA 98057-3356; fax (425) 227-1181. 
The report shall include the information specified in paragraphs 
(l)(1), (l)(2), (l)(3), (l)(4), and (l)(5) of this AD. Information 
collection requirements contained in this regulation have been 
approved by the Office of Management and Budget (OMB) under the 
provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et 
seq.) and have been assigned OMB Control Number 2120-0056.
    (1) The airplane serial number.
    (2) The total hours' time-in-service accumulated on the 
airplane.
    (3) The total number of flight cycles accumulated on the 
airplane.
    (4) A description of any damage found.
    (5) The location of where the damaged part was installed.
    (m) For airplanes having line numbers 433 and subsequent: Within 
14 days after accomplishing the initial inspection required by 
paragraph (g) of this AD, submit any damaged part to the Manager, 
Seattle ACO. The damaged part shall be tagged to include the 
information specified in paragraphs (l)(1), (l)(2), (l)(3), (l)(4), 
and (l)(5) of this AD. Additionally, operators shall align the inner 
sleeving, outer sleeving, and wire as installed in the airplane, and 
secure the sleeving and wiring in place by taping or other means 
when submitting the damaged part to the Manager, Seattle ACO. 
Information collection requirements contained in this regulation 
have been approved by the OMB under the provisions of the Paperwork 
Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and have been 
assigned OMB Control Number 2120-0056.

New Reduced Inspection Intervals

Repetitive Inspections

    (n) Do the next inspection required by paragraph (h) of this AD 
at the time specified in paragraph (n)(1) or (n)(2) of this AD, as 
applicable, in accordance with Boeing Alert Service Bulletin 747-
28A2204, Revision 3, dated March 11, 2010. Repeat the inspection 
thereafter at intervals not to exceed 15,000 flight hours. 
Accomplishing the initial inspection in this paragraph ends the 
repetitive inspection requirements of paragraph (h) of this AD.
    (1) For airplanes on which the inspection required by paragraph 
(g) of this AD has been done as of the effective date of this AD: Do 
the inspection at the earlier of the times specified in paragraph 
(n)(1)(i) and (n)(1)(ii) of this AD.
    (i) Within 15,000 flight hours after the most recent inspection, 
or within 6,000 flight

[[Page 41662]]

hours after the effective date of this AD, whichever occurs later.
    (ii) Within 20,000 flight cycles or 60,000 flight hours after 
the most recent inspection required by paragraph (g) or (h) of this 
AD, whichever occurs first.
    (2) For airplanes on which the inspection required by paragraph 
(g) of this AD has not been done as of the effective date of this 
AD: Do the inspection before the accumulation of 15,000 total flight 
hours, or within 6,000 flight hours after the effective date of this 
AD, whichever occurs later.

Paperwork Reduction Act Burden Statement

    (o) A federal agency may not conduct or sponsor, and a person is 
not required to respond to, nor shall a person be subject to a 
penalty for failure to comply with a collection of information 
subject to the requirements of the Paperwork Reduction Act unless 
that collection of information displays a current valid OMB Control 
Number. The OMB Control Number for this information collection is 
2120-0056. Public reporting for this collection of information is 
estimated to be approximately 5 minutes per response, including the 
time for reviewing instructions, completing and reviewing the 
collection of information. All responses to this collection of 
information are mandatory. Comments concerning the accuracy of this 
burden and suggestions for reducing the burden should be directed to 
the FAA at: 800 Independence Ave., SW., Washington, DC 20591, Attn: 
Information Collection Clearance Officer, AES-200.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (p) Actions done before the effective date of this AD in 
accordance with Boeing Alert Service Bulletin 747-28A2204, Revision 
2, dated September 1, 2005, are acceptable for compliance with the 
corresponding requirements of this AD.

Alternative Methods of Compliance (AMOCs)

    (q)(1) The Manager, Seattle ACO, FAA, has the authority to 
approve AMOCs for this AD, if requested using the procedures found 
in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request 
to your principal inspector or local Flight Standards District 
Office, as appropriate. If sending information directly to the 
manager of the ACO, send it to ATTN: Tung Tran, 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. Information may be e-
mailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
    (2) Before using any approved AMOC, notify your Principal 
Maintenance Inspector or Principal Avionics Inspector, as 
appropriate, or lacking a principal inspector, your local Flight 
Standards District Office.
    (3) AMOCs approved previously in accordance with AD 97-26-07, 
Amendment 39-10250, are approved as alternative methods of 
compliance with the corresponding requirements of this AD. 
Compliance time extensions approved previously in accordance with AD 
97-26-07, are not approved as alternative methods of compliance for 
the compliance times required by paragraph (n) of this AD.

Material Incorporated by Reference

    (r) You must use Boeing Alert Service Bulletin 747-28A2204, 
Revision 3, dated March 11, 2010, to do the actions required by this 
AD, unless the AD specifies otherwise.
    (1) The Director of the Federal Register approved the 
incorporation by reference of Boeing Alert Service Bulletin 747-
28A2204, Revision 3, dated March 11, 2010, under 5 U.S.C. 552(a) and 
1 CFR part 51.
    (2) For service information identified in this 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.
    (3) You may review copies of the 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.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at an NARA facility, call 202-741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on July 1, 2011.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-17404 Filed 7-14-11; 8:45 am]
BILLING CODE 4910-13-P