AD 2007-25-13 Airworthiness Directives; Boeing Model 767-300F Series Airplanes

Models named: 767-300F series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to Boeing Model 767-300F series airplanes, certificated in any category; as identified in Boeing Special Attention Service Bulletin 767-21-0192, dated March 23, 2006.

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 36 months after the effective date of this AD, do the applicable action specified in Table 1 of this AD in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 767-21-0192, dated March 23, 2006. Table 1.—Replacement For airplanes identified in the service bulletin as— Do the following action— (1) Group 1 airplanes Replace the rotomolded duct between the transition duct of the right cooling pack and the mix manifold with a new duct made of aluminum. (2) Group 2 airplanes Replace the rotomolded ducts of the mix manifold system with new ducts made from Kevlar® and aluminum. Alternative Methods of Compliance (AMOCs) (g)(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 (h) You must use Boeing Special Attention Service Bulletin 767-21-0192, dated March 23, 2006, 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 this document 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/code_of_federal_regulations/ibr_locations.html . Issued in Renton, Washington, on November 23, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7-23685 Filed 12-7-07; 8:45 am] BILLING CODE 4910-13-P

This AD results from a report of failures of the duct joint seal of the mix manifold system. We are issuing this AD to prevent air conditioning leakage into the mix manifold bay. Such leakage could decrease the air flow to the flight compartment and main cabin or could allow smoke into the flight compartment in the event of a fire in the main cabin or forward cargo compartment.