[Federal Register Volume 76, Number 3 (Wednesday, January 5, 2011)]
[Rules and Regulations]
[Pages 426-428]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-33003]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0855; Directorate Identifier 2010-NM-066-AD;
Amendment 39-16566; AD 2011-01-12]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Model 737-300, -400,
and -500 Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: We are superseding an existing airworthiness directive (AD)
for the products listed above. That AD currently requires repetitive
inspections for discrepancies of the fuse pins of the inboard and
outboard midspar fittings of the nacelle strut, and corrective actions
if necessary. This new AD requires replacing the midspar fuse pins with
new, improved fuse pins, which would terminate the repetitive
inspections. This AD was prompted by a report of corrosion damage of
the chrome runout on the head side found on all four midspar fuse pins
of the nacelle strut. Additionally, a large portion of the chrome plate
was missing from the corroded area of the shank. We are issuing this AD
to prevent damage of the fuse pins of the inboard and outboard midspar
fittings of the nacelle strut, which could result in reduced structural
integrity of the fuse pins, and consequent loss of the strut and
separation of the engine from the airplane.
DATES: This AD is effective February 9, 2011.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in the AD as of February 9,
2011.
The Director of the Federal Register approved the incorporation by
reference of a certain other publication listed in this AD as of
November 13, 2008 (73 FR 59493, October 9, 2008).
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 [email protected];
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 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 New Jersey Avenue, SE.,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Alan Pohl, Aerospace Engineer,
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425)
917-6450; fax (425) 917-6590; e-mail: [email protected].
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to supersede airworthiness directive (AD) 2008-21-03, Amendment
39-15687 (73 FR 59493, October 9, 2008). That AD applies to the
specified products. The NPRM published in the Federal Register on
September 23, 2010 (75 FR 57882). That NPRM proposed to continue to
require repetitive inspections for discrepancies of the fuse pins of
the inboard and outboard midspar fittings of the nacelle strut, and
corrective actions if necessary. That NPRM also proposed to require
replacing the midspar fuse pins with new, improved fuse pins, which
would terminate the requirement for repetitive detailed inspections.
[[Page 427]]
Comments
We gave the public the opportunity to participate in developing
this AD. We have considered the comment received. Boeing supports the
NPRM.
Conclusion
We reviewed the relevant data, considered the comments received,
and determined that air safety and the public interest require adopting
the AD as proposed.
Costs of Compliance
There are about 1,961 airplanes of the affected design in the
worldwide fleet. The following table provides the estimated costs for
U.S. operators to comply with this AD.
Estimated Costs
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Number of U.S.-
Action Work hours Average labor Parts Cost per registered Fleet cost
rate per hour airplane airplanes
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Repetitive detailed 4................ $85 None.................. $340, per 616 $209,440, per inspection
inspections (required by AD inspection cycle.
2008-21-03). cycle.
Midspar fuse pin replacement 1 per pin (up to 85 $843 per pin.......... Up to $3,712.... 616 Up to $2,286,592.
(new action). 4 pins per
airplane).
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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 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
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)
2008-21-03, Amendment 39-15687 (73 FR 59493, October 9, 2008), and
adding the following new AD:
2011-01-12 The Boeing Company: Amendment 39-16566; Docket No. FAA-
2010-0855; Directorate Identifier 2010-NM-066-AD.
Effective Date
(a) This airworthiness directive (AD) is effective February 9,
2011.
Affected ADs
(b) This AD supersedes AD 2008-21-03, Amendment 39-15687.
Applicability
(c) This AD applies to all The Boeing Company Model 737-300, -
400, and -500 series airplanes, certificated in any category.
Subject
(d) Air Transport Association (ATA) of America Code 54:
Nacelles/Pylons.
Unsafe Condition
(e) This AD results from a report of corrosion damage of the
chrome runout on the head side found on all four midspar fuse pins
of the nacelle strut. Additionally, a large portion of the chrome
plate was missing from the corroded area of the shank. The Federal
Aviation Administration is issuing this AD to prevent damage of the
fuse pins of the inboard and outboard midspar fittings of the
nacelle strut, which could result in reduced structural integrity of
the fuse pins, and consequent loss of the strut and separation of
the engine from 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.
Restatement of Requirements of AD 2008-21-03
Repetitive Inspections/Corrective Actions, With Revised Service
Information
(g) At the applicable time specified in paragraph 1.E.,
``Compliance'' of Boeing Special Attention Service Bulletin 737-54-
1044, dated December 10, 2007; except, where that service bulletin
specifies a compliance time after the date on that service bulletin,
this AD requires compliance within the specified compliance time
after November 13, 2008 (the effective date of AD 2008-21-03): Do a
detailed inspection for discrepancies of the fuse pins of the
inboard and outboard midspar fittings of the nacelle strut by doing
all the actions, including all applicable corrective actions, in
accordance with the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 737-54-1044, dated December 10, 2007; or
Boeing Alert Service Bulletin 737-54A1044, Revision 2, dated January
20, 2010. Do all applicable corrective actions before further
flight. Repeat the inspection at the time specified in paragraph
1.E. of Boeing Special Attention Service Bulletin 737-54-1044, dated
December 10, 2007. Accomplishing the actions of paragraph (h) of
this AD terminates the requirements of this paragraph.
[[Page 428]]
New Requirements of This AD
Replacement
(h) Within 120 months after the effective date of this AD,
replace all midspar fuse pins having part number (P/N) 311A1092-2
with a midspar fuse pin having P/N 311A1092-3, in accordance with
the Accomplishment Instructions of Boeing Alert Service Bulletin
737-54A1044, Revision 2, dated January 20, 2010. Accomplishing the
requirements of this paragraph terminates the requirements of
paragraph (g) of this AD for that fuse pin.
Actions Accomplished According to Previous Revision of Service
Information
(i) Actions done before the effective date of this AD in
accordance with Boeing Special Attention Service Bulletin 737-54-
1044, Revision 1, dated November 26, 2008, are acceptable for
compliance with the corresponding requirements of this AD.
Alternative Methods of Compliance (AMOCs)
(j)(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: Alan Pohl, Aerospace Engineer, Airframe Branch, ANM-120S, FAA,
Seattle Aircraft Certification Office, 1601 Lind Avenue, SW.,
Renton, Washington 98057-3356; telephone (425) 917-6450; fax (425)
917-6590. Information may be e-mailed to: [email protected].
(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.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair required by this AD if it is approved by the
Boeing Commercial Airplanes Organization Designation Authorization
(ODA) that has been authorized by the Manager, Seattle ACO, to make
those findings. For a repair method to be approved, the repair must
meet the certification basis of the airplane, and the approval must
specifically refer to this AD.
(4) AMOCs approved in accordance with the requirements of AD
2008-21-03 are acceptable for the corresponding requirements of this
AD.
Related Information
(k) For more information about this AD, contact Alan Pohl,
Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft
Certification Office, 1601 Lind Avenue, SW., Renton, Washington
98057-3356; telephone (425) 917-6450; fax (425) 917-6590; e-mail:
[email protected].
Material Incorporated by Reference
(l) You must use Boeing Special Attention Service Bulletin 737-
54-1044, dated December 10, 2007; or Boeing Alert Service Bulletin
737-54A1044, Revision 2, dated January 20, 2010; as applicable; 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 737-
54A1044, Revision 2, dated January 20, 2010, under 5 U.S.C. 552(a)
and 1 CFR part 51.
(2) The Director of the Federal Register previously approved the
incorporation by reference of Boeing Special Attention Service
Bulletin 737-54-1044, dated December 10, 2007, on November 13, 2008
(73 FR 59493, October 9, 2008).
(3) 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
[email protected]; Internet https://www.myboeingfleet.com.
(4) You may review copies of the service information at the FAA,
1601 Lind Avenue, SW., Renton, Washington. For information on the
availability of this material at the FAA, call 425-227-1221.
(5) 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 December 22, 2010.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-33003 Filed 1-4-11; 8:45 am]
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