AD 2005-15-15 Airworthiness Directives; Boeing Model 757-200, -200PF, and -200CB Series Airplanes Equipped With Pratt & Whitney or Rolls-Royce Engines

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

This AD applies to Boeing Model 757-200, -200PF, and -200CB series airplanes, line numbers 1 through 735 inclusive, certificated in any category; equipped with Pratt & Whitney or Rolls-Royce engines.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection of Fuse Pin (f) Within 24 months after the effective date of this AD, perform a detailed inspection to determine the P/N of the upper link forward fuse pins of the engine struts, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 757-54-0048, dated May 13, 2004, except as provided in paragraphs (g) and (h) of this AD. 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.” (1) If the fuse pin is P/N 311N5501-1 or P/N 311N5060-1, no further action is required for that fuse pin. (2) If the fuse pin is P/N 311N5501-2, prior to further flight, replace the fuse pin with a new or serviceable fuse pin, P/N 311N5501-1, in accordance with the Accomplishment Instructions of the service bulletin. (3) If the P/N of the fuse pin cannot be determined by inspection, use a tool such as an inside reading micrometer to determine the inside diameter (ID) of the fuse pin bore. (i) If the ID of the fuse pin bore is greater than or equal to 0.850 inch, no further action is required for that fuse pin. (ii) If the ID of the fuse pin bore is less than 0.850 inch, prior to further flight, replace the fuse pin as specified in paragraph (f)(2) of this AD. (g) Where Boeing Special Attention Service Bulletin 757-54-0048, dated May 13, 2004, permits the use of an “approved equivalent procedure” for access and replacement of the fuse pin(s), this AD requires that access and replacement be done in accordance with the instructions of the aircraft maintenance manual (AMM) as specified in the service bulletin. Optional Alternative to Inspections (h) Instead of the inspections required by paragraph (f) of this AD, a review of the airplane maintenance records is acceptable if the P/N of the fuse pins can be positively determined from that review. Parts Installation (i) As of the effective date of this AD, no person may install a fuse pin, P/N 311N5501-2, on any airplane identified in the applicability 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 in accordance with the procedures found in 14 CFR 39.19. (2) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD, if it is approved by an Authorized Representative for the Boeing Delegation Option Authorization Organization who 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. Material Incorporated by Reference (k) You must use Boeing Special Attention Service Bulletin 757-54-0048, dated May 13, 2004, to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approves the incorporation by reference of this document in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To get copies of the service information, contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207. To view the AD docket, go to the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW, room PL-401, Nassif Building, Washington, DC. To review copies of the service information, go to 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 . Issued in Renton, Washington, on July 14, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-14685 Filed 7-27-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report indicating that, due to an incorrect listing in the illustrated parts catalog, persons performing maintenance on the engine strut(s) could have installed an incorrect upper link forward fuse pin having part number (P/N) 311N5501-2. We are issuing this AD to prevent a ruptured wing box, due to the engine not separating safely during certain emergency landing conditions, which could lead to a fuel spill and consequent fire.