Airworthiness directives › 2005-01-12
AD 2005-01-12 Airworthiness Directives; Boeing Model 757-200, -200PF, and -200CB Series Airplanes
Models named: 757-200, -200PF, -200CB series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
Model 757-200, -200PF, and -200CB series airplanes, line numbers 1 through 979 inclusive; certificated in any category.
Compliance
Required as indicated, unless accomplished previously. To prevent a flap skew due to insufficient secondary load path of the ballscrew of the trailing edge flaps in the event that the primary load path fails, which could result in possible loss of a flap and reduced controllability of the airplane, accomplish the following: Inspection and Corrective Action (a) Within 48 months after the effective date of this AD, do an inspection of the ballscrews of the trailing edge flap system to find their part numbers (P/N). If the P/N of the ballscrew is S251N401-5 (Thomson Saginaw P/N 7820921) or S251N401-9 (Thomson Saginaw P/N 7821341), within 48 months after the effective date of this AD, replace the ballscrew with a new, serviceable, or modified ballscrew, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757-27A0139, dated June 16, 2003. Parts Installation (b) As of the effective date of this AD, no person may install a trailing edge flap ballscrew, P/N S251N401-5 (Thomson Saginaw P/N 7820921) or S251N401-9 (Thomson Saginaw P/N 7821341), on any airplane. Alternative Methods of Compliance (c) In accordance with 14 CFR 39.19, the Manager, Seattle Aircraft Certification Office, FAA, is authorized to approve alternative methods of compliance for this AD. Incorporation by Reference (d) Unless otherwise specified in this AD, the actions shall be done in accordance with Boeing Alert Service Bulletin 757-27A0139, dated June 16, 2003. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal_register/ code_of_federal_regulations/ibr_locations.html . Effective Date (e) This amendment becomes effective on February 14, 2005. Issued in Renton, Washington, on December 29, 2004. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-281 Filed 1-7-05; 8:45 am] BILLING CODE 4910-13-P
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1