2009-22-14: Main equipment center

2009-22-14 Boeing: Amendment 39-16067. Docket No. FAA-2008-1362; Directorate Identifier 2008-NM-150-AD. \n\nEffective Date \n\n\t(a) This airworthiness directive (AD) is effective December 8, 2009. \n\nAffected ADs \n\n\t(b) None. \n\nApplicability \n\n\t(c) This AD applies to Boeing Model 747-200C and 747-200F series airplanes, certificated in any category, as identified in Boeing Alert Service Bulletin 747-25A3431, dated March 6, 2008. \n\nUnsafe Condition \n\n\t(d) This AD results from reports of water contamination in the electrical/electronic units in the main equipment center. We are issuing this AD to prevent water contamination in the electrical/ electronic units in the main equipment center, which could result in an electrical short and potential loss of several functions essential for safe flight. \n\nCompliance \n\n\t(e) Comply with this AD within the compliance times specified, unless already done. \n\nInstallation of Shrouds and Drain Lines \n\n\t(f) Within 72 months after theeffective date of this AD, install larger moisture shrouds and additional drain lines, by doing all the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-25A3431, dated March 6, 2008. \n\nInstallation of Moisture Curtains \n\n\t(g) Prior to or concurrently with accomplishing the actions required by paragraph (f) of this AD: Install protective moisture curtains in the main equipment center in accordance with Boeing Service Bulletin 747-25A3430, Revision 1, dated October 9, 2008. \n\n\tNote 1: The installation required by paragraph (g) of this AD is the same installation required by paragraph (f) of AD 2007-26-03, amendment 39-15305, for Boeing Model 747-200C and -200F series airplanes (AD 2007-26-03 specifies that the actions be done in accordance with Boeing Alert Service Bulletin 747-25A3430, dated February 15, 2007). Boeing Service Bulletin 747-25A3430, Revision 1, dated October 9, 2008, which affects Boeing Model 747-200F airplanes,variable numbers RR566 and RR551 through RR556 inclusive, is an alternative method of compliance for the requirements of paragraph (g) of AD 2007-26-03. Airplanes identified as Group 1, Group 3, and Group 6 airplanes in Boeing Service Bulletin 747- 25A3430, Revision 1, dated October 9, 2008, must comply with paragraph (g) of AD 2007-26-03. \n\nInstallations Accomplished According to Previous Issue of Service Bulletin \n\n\t(h) Installations accomplished before the effective date of this AD in accordance with Boeing Alert Service Bulletin 747-25A3430, dated February 15, 2007, are considered acceptable for compliance with the corresponding action, paragraph (g) of this AD. \n\nAlternative Methods of Compliance (AMOCs) \n\n\t(i)(1) The Manager, Seattle Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Marcia Smith, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 917-6484; fax (425) 917-6590. Or, e-mail information to [email protected]. \n\t(2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. \n\nMaterial Incorporated by Reference \n\n\t(j) You must use Boeing Alert Service Bulletin 747-25A3431, dated March 6, 2008; and Boeing Service Bulletin 747-25A3430, Revision 1, dated October 9, 2008; as applicable; to do the actions required by this AD, unless the AD specifies otherwise. \n\t(1) The Director ofthe Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. \n\t(2) 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; e-mail [email protected]; Internet https://www.myboeingfleet.com. \n\t(3) You may review copies of the 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 or 425-227-1152. \n\t(4) You may also review copies of the service information that is incorporated by reference 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.