Boein

i[Federal Register Volume 76, Number 211 (Tuesday, November 1, 2011)]
[Rules and Regulations]
[Pages 67343-67346]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-28053]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-1162; Directorate Identifier2011-NM-186-AD; Amendment 39-16856;
AD 2011-23-05]
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; request for comments.
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SUMMARY: We are superseding an existing airworthiness directive (AD) for certain Model 737300, -400, and -500 seriesairplanes. That AD currently requires repetitive inspections for cracking of
the 1.04-inch nominal diameter wire penetration hole, and applicable related investigative and
corrective actions. This AD reduces the compliance times for those actions. This AD was prompted
by reports of cracking in the frame, or in the frame and frame reinforcement, common to the 1.04inch nominal diameter wirepenetration hole intended for wire routing; and recent reports of multiple
adjacent frame cracking found before the compliance time required by the existing AD. Such
cracking could reduce the structural capability of the frames to sustain limit loads, and result in
cracking in the fuselage skin and subsequent rapid depressurization of the airplane. We are issuing
this AD to correct the unsafecondition on these products.
DATES: This AD is effective November 16, 2011.
The Director of the Federal Register approved the incorporation by reference of a certain
publication listed in the AD as of November 16, 2011.
We must receive any comments on this AD by December 16, 2011.
ADDRESSES: You may send comments by any of the following methods:
• Federal eRulemaking Portal: Go tohttp://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.
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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; email me.boecom@boeing.com; Internethttps://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 Facilitybetween 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 street address for the Docket Office (phone: (800) 647-5527) is in the
ADDRESSES section. Comments will be available in the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Wayne Lockett,Aerospace Engineer, Airframe
Branch, ANM-120S, Seattle Aircraft Certification Office (ACO), FAA, 1601 Lind Avenue SW.,
Renton, Washington 98057-3356; phone: (425) 917-6447; fax: (425) 917-6590; email:
wayne.lockett@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
On August 26, 2009, we issued AD 2009-02-06 R1, Amendment 39-16015 (74 FR 45979,
September 8, 2009), for certain Model 737-300, -400, and...