AD 2007-26-03 Airworthiness Directives; Boeing Model 747-200C and -200F Series Airplanes

Models named: 747-200C, -200F series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Boeing Model 747-200C and -200F series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 747-25A3430, dated February 15, 2007.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Installations (f) Within 24 months after the effective date of this AD, install mounting brackets, support angles, and moisture curtains in the main equipment center, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-25A3430, dated February 15, 2007. Prior or Concurrent Requirements (g) For airplanes identified as Group 1 and Group 3 airplanes in Boeing Alert Service Bulletin 747-25A3430, dated February 15, 2007: Prior to or concurrently with the requirements of paragraph (f) of this AD, install drip shields (including a drip pan assembly, drain tubing, and attaching hardware) over the forward, outboard halves of the E1-1 and E3-1 shelves in the main equipment bay, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 747-38A2073, Revision 3, dated May 22, 2003. (h) Installation of drip shields before the effective date of this AD in accordance with paragraph (a) and Note 2 of AD 2001-24-30, amendment 39-12547, is acceptable for compliance with the corresponding actions specified in paragraph (g) of this AD. Alternative Methods of Compliance (AMOCs) (i)(1) 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. (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 appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Material Incorporated by Reference (j) You must use the service bulletins identified in Table 1 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 FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or 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/cfr/ibr-locations.html . Table 1.—Material Incorporated by Reference Service Bulletin Revision level Date Boeing Alert Service Bulletin 747-25A3430 Original February 15, 2007. Boeing Alert Service Bulletin 747-38A2073 3 May 22, 2003. Issued in Renton, Washington, on December 10, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-24340 Filed 12-14-07; 8:45 am] BILLING CODE 4910-13-P

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 of the electrical/electronic units, which could cause the electrical/electronic units to malfunction, and as a consequence, could adversely affect the airplane's continued safe flight.