AD 2005-17-09 Airworthiness Directives; Boeing Model 747, 757, 767 and 777 Series Airplanes

Models named: 747, 757, 767, 777 series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Model 747, 757, 767, and 777 series airplanes having the line numbers (L/Ns) listed in Table 1 of this AD; certificated in any category. Table 1.—Applicability Model Affected L/Ns Except L/Ns 747 1 through 299 inclusive and 951 through 1234 inclusive 292, 296, 297, 1174, 1216. 757 2 through 895 inclusive 870, 886, 894. 767 470 through 768 inclusive 758. 777 2 through 253 inclusive 120, 219, 230, 235, 242, 245, 249.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Requirements of AD 2000-26-04 Modification (f) Within 6 years after February 2, 2001 (the effective date of AD 2000-26-04), accomplish paragraphs (f)(1), (f)(2), and (f)(3) of this AD; in accordance with Boeing Service Bulletin 747-25-3253, dated June 29, 2000, or Revision 3, dated September 4, 2003; 757-25-0226, dated July 3, 2000, or Revision 3, dated September 2, 2004; 757-25-0228, dated July 3, 2000, or Revision 1, dated March 28, 2002; 767-25-0290, dated June 29, 2000, or Revision 4, dated October 28, 2004; or 777-25-0164, dated June 29, 2000, or Revision 1, including Appendices A, B, C, and D, all dated March 22, 2001; as applicable; except as provided by paragraph (g) of this AD. For Model 757-200, -200CB, and -200PF series airplanes identified as being in Groups 1 and 3 in Boeing Service Bulletin 757-25-0226, Revision 3: As of the effective date of this AD, only Revision 3 of the service bulletin may be used. For Model 747 and 767 series airplanes: As of the effective date of this AD, only Boeing Service Bulletin 747-25-3253, Revision 3, or 767-25-0290, Revision 4, as applicable, may be used. (1) Modify drip shields located on the flight deck by installing fire blocks. (2) Prior to further flight following accomplishment of paragraph (f)(1) of this AD, perform a functional test of any system disturbed by the modification, in accordance with the applicable service bulletin or airplane maintenance manual (AMM), as applicable. If any functional test fails, prior to further flight, isolate the fault, correct the discrepancy in accordance with the applicable AMM, and repeat the failed test until it is successfully accomplished. (3) Prior to further flight following the accomplishment of paragraphs (f)(1) and (f)(2) of this AD, install placards on all modified drip shields. (g) If any wires or equipment are installed on the outboard surface of the drip shield (that is, between the drip shield and the airplane structure), modify that area in accordance with a method approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA. Optional Sampling (Certain Model 747 Series Airplanes) (h) For Model 747 series airplanes listed in Group 1 in Boeing Service Bulletin 747-25-3253, Revision 3, dated September 4, 2003: In lieu of accomplishing paragraph (f) of this AD, within 6 years after February 2, 2001, collect samples of the insulation and adhesive of the drip shields, and submit the samples to the manufacturer for testing, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 747-25-3253, dated June 29, 2000, or Revision 3, dated September 4, 2003. After the effective date of this AD, only Revision 3 may be used. (1) If the test on all samples is positive, no further action is required by this AD. (2) If the test on any sample is negative, accomplish paragraph (f) of this AD before the compliance time specified in that paragraph. New Requirements of This AD Model 757-200/-200CB/-200PF Series Airplanes Previously Modified (i) For Model 757-200, -200CB, and -200PF series airplanes identified as being in Group 1 or 3 in Boeing Service Bulletin 757-25-0226, Revision 3, dated September 2, 2004, and that were modified before the effective date of this AD in accordance with Boeing Service Bulletin 757-25-0226, dated July 3, 2000: Within 72 months after the effective date of this AD, modify drip shields located above windows number 2 and 3 on the flight deck by installing fire blocks, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 757-25-0226, Revision 3, dated September 2, 2004; except as provided by paragraph (g) of this AD. After the modification, do the actions required by paragraphs (f)(2) and (f)(3) of this AD because these actions apply to the drip shields modified in accordance with this paragraph. Previously Accomplished Actions (j) Modifying the drip shields before the effective date of this AD in accordance with the applicable service bulletin specified in paragraph (j)(1), (j)(2), or (j)(3) of this AD is acceptable for compliance with the corresponding requirements of paragraphs (f) and (i) of this AD, as applicable. (1) For Model 757-200, -200CB, and -200PF series airplanes: Boeing Service Bulletin 757-25-0226, Revision 2, dated October 31, 2002. (2) For Model 757-200, -200CB, and -200PF series airplanes identified in Groups 2 and 4 of Boeing Service Bulletin 757-25-0226, Revision 3, dated September 2, 2004: Boeing Service Bulletin 757-25-0226, Revision 1, dated February 15, 2001. (3) For Model 767 series airplanes: Boeing Service Bulletin 767-25-0290, Revision 3, dated June 26, 2003. Alternative Methods of Compliance (AMOCs) (k)(1) The Manager, Seattle ACO, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. (2) Except for Model 757-200, -200CB, and -200PF series airplanes listed in Groups 1 and 3 of Boeing Service Bulletin 757-25-0226, Revision 3, dated September 2, 2004: Alternative methods of compliance, approved previously in accordance with AD 2000-26-04, amendment 39-12054, are approved as alternative methods of compliance with this AD. Material Incorporated by Reference (l) You must use the applicable documents listed in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. Table 2.—Material Incorporated by Reference Boeing service bulletin Revision level Date 747-25-3253, including Appendices A, B, and C Original June 29, 2000. 747-25-3253 3 September 4, 2003. 757-25-0226, including Appendices A, B, and C Original July 3, 2000. 757-25-0226 3 September 2, 2004. 757-25-0228, including Appendices A, B, and C Original July 3, 2000. 757-25-0228 1 March 28, 2002. 767-25-0290, including Appendices A, B, and C Original June 29, 2000. 767-25-0290 4 October 28, 2004. 777-25-0164, including Appendices A, B, and C Original June 29, 2000. 777-25-0164, including Appendices A, B, C, and D 1 March 22, 2001. (1) The Director of the Federal Register approves the incorporation by reference of the documents listed in Table 3 of this AD in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Table 3.—New Material Incorporated by Reference Boeing service bulletin Revision level Date 747-25-3253 3 September 4, 2003. 757-25-0226 3 September 2, 2004. 757-25-0228 1 March 28, 2002. 767-25-0290 4 October 28, 2004. 777-25-0164, including Appendices A, B, C, and D 1 March 22, 2001. (2) On February 2, 2001 (65 FR 82901, December 29, 2000), the Director of the Federal Register approved the incorporation by reference of the documents listed in Table 4 of this AD. Table 4.—Material Previously Incorporated by Reference Boeing service bulletin Revision level Date 747-25-3253, including Appendices A, B, and C Original June 29, 2000. 757-25-0226, including Appendices A, B, and C Original July 3, 2000. 757-25-0228, including Appendices A, B, and C Original July 3, 2000. 767-25-0290, including Appendices A, B, and C Original June 29, 2000. 777-25-0164, including Appendices A, B, and C Original June 29, 2000. (3) 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/cfr/ibr-locations.html . Issued in Renton, Washington, on August 11, 2005. Kalene C. Yanamura, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-16455 Filed 8-22-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a determination that certain airplanes have drip shields that are not adequately resistant to fire. We are issuing this AD to prevent potential ignition of the moisture barrier cover of the drip shield, which could propagate a small fire that results from an electrical arc, leading to a larger fire.