AD 2005-12-10 Airworthiness Directives; Boeing Model 747-200F and -400 Series Airplanes; Model 767-400ER Series Airplanes; and Model 777 Series Airplanes

This AD applies to the airplanes listed in Table 1 of this AD, certificated in any category: Table 1.—Applicability Boeing model— As listed in Boeing service bulletin— 747-200F and -400 series airplanes 747-25-3313, Revision 1, dated May 15, 2003. 767-400ER series airplanes 767-25-0335, dated November 7, 2002. 777 series airplanes 777-25-0210, dated October 17, 2002.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Replacement (f) Within 18 months after the effective date of this AD, replace the frequency converter(s) used to supply electrical power to utility outlets (for the galley, medical equipment, or personal computers) with modified frequency converter(s); and do other applicable specified actions; by doing all of the actions in the Accomplishment Instructions of the applicable service bulletin listed in Table 2 of this AD. Table 2.—Applicability Service Bulletins For model— Use Boeing service bulletin— 747-200F and -400 series airplanes 747-25-3313, Revision 1, dated May 15, 2003. 767-400ER series airplanes 767-25-0335, dated November 7, 2002. 777 series airplanes 777-25-0210, dated October 17, 2002. Note 1: Boeing Service Bulletin 747-25-3313, Revision 1, dated May 15, 2003, refers to JAMCO Service Bulletin CAW74-25-1697, dated June 7, 2002, as an additional source of information for procedures to remove and install certain galley frequency converters. Concurrent Service Bulletin (g) For airplanes listed as Group 3 in the Effectivity of Boeing Service Bulletin 777-25-0210, dated October 17, 2002: Prior to or concurrently with the actions in Boeing Service Bulletin 777-25-0210, dated October 17, 2002, deactivate the galley frequency converter in accordance with the Accomplishment Instructions of Monogram Systems Service Bulletin 872869-25-2098, dated May 1, 2002. Alternative Methods of Compliance (AMOCs) (h) 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. Material Incorporated by Reference (i) You must use the service information that is specified in Table 3 of this AD 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 those documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To get copies of the service information, go to 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 NARA, call (202) 741-6030, or go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html. Table 3.—Material Incorporated by Reference Service bulletin Revision level Date Boeing Service Bulletin 747-25-3313 1 May 15, 2003. Boeing Service Bulletin 767-25-0335 Original November 7, 2002. Boeing Service Bulletin 777-25-0210 Original October 17, 2002. Monogram Systems Service Bulletin 872869-25-2098 Original May 1, 2002. Issued in Renton, Washington, on May 27, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05-11711 Filed 6-14-05; 8:45 am] BILLING CODE 4910-13-P

This AD was prompted by a report that a hard short condition between the frequency converter's output and its downstream circuit breakers will produce a continuous current, that could cause the undersized output wiring to overheat. We are issuing this AD to prevent the overheating of the frequency converter's output wiring, which could lead to the failure of a wire bundle, and consequent adverse effects on other systems sharing the affected wire bundle.