AD 2005-18-18 Airworthiness Directives; Boeing Model 757 Airplanes

Models named: 757-200, -200PF, -200CB, -300 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Model 757-200, -200PF, -200CB, and -300 series airplanes; certificated in any category; equipped with Rolls-Royce engines; as identified in Boeing Alert Service Bulletins 757-28A0073 and 757-28A0074, both Revision 1, both dated February 24, 2005.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. One-Time Inspections/Related Investigative and Corrective Actions (f) Within 60 months after the effective date of this AD, do the actions required by paragraphs (f)(1) and (f)(2) of this AD. (1) Accomplish the detailed inspections for discrepancies of the wire bundles in the left and right engine-to-wing aft fairings, and applicable and related investigative and corrective actions if necessary, as applicable, by doing all the actions specified in the Accomplishment Instructions of the applicable service bulletins listed in Table 1 of this AD. Accomplish any related investigative and corrective actions before further flight in accordance with the applicable service bulletin. Table 1.—Airplane Models and Service Bulletins Boeing airplanes Boeing Alert Service Bulletin Revision level Date Model 757-200, -200CB, 200PF series airplanes 757-28A0073 Original November 20, 2003. Model 757-200, -200CB, 200PF series airplanes 757-28A0073 1 February 24, 2005. Model 757-300 series airplanes 757-28A0074 Original November 20, 2003. Model 757-300 series airplanes 757-28A0074 1 February 24, 2005. (2) Install back-to-back p-clamps between the wire and hydraulic supply tube at the aft end of the right-hand strut only; and re-route the wire bundles, if necessary, by doing all the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 757-28A0073 or 757-28A0074, both Revision 1, both dated February 24, 2005; as applicable. Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.” Alternative Methods of Compliance (AMOCs) (g) The Manager, Seattle Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. Material Incorporated by Reference (h) You must use the applicable service bulletin listed in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room PL-401, Nassif Building, Washington, DC; on the Internet at http://dms.dot.gov ; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Table 2.—Material Incorporated by Reference Boeing Alert Service Bulletin Revision level Date 757-28A0073 Original November 20, 2003. 757-28A0073 1 February 24, 2005. 757-28A0074 Original November 20, 2003. 757-28A0074 1 February 24, 2005. Issued in Renton, Washington, on August 31, 2005. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-17772 Filed 9-8-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report indicating that a circuit breaker for the fuel shutoff valve tripped due to a wire that chafed against the structure in the flammable leakage zone of the aft fairing, causing a short circuit. The FAA is issuing this AD to prevent chafing between the wire bundle and the structure of the aft fairing, which could result in electrical arcing and subsequent ignition of flammable vapors and possible uncontrollable fire.