AD 2007-07-05 Airworthiness Directives; Boeing Model 777 Airplanes

Models named: 777-200, -200LR, -300, -300ER series. Read the applicability below — it usually turns on serial or part numbers too.

This AD applies to all Boeing Model 777-200, -200LR, -300, and -300ER series airplanes, certificated in any category.

You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection to Determine Part Number (P/N) of the ASCPCs (f) For all airplanes: Within 90 days after the effective date of this AD, perform an inspection of the left and right ASCPCs to determine the part number. ASCPC Software Installation (g) For airplanes on which any ASCPC having P/N 1152972-4 is found during the inspection required by paragraph (f) of this AD: Within 90 days after the effective date of this AD, install new ASCPC operational program software (OPS) in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-36A0026, Revision 1, dated February 8, 2007. Installation of Certain OPS Prohibited (h) As of the effective date of this AD, installation of OPS P/N 3673-GRS-101-00, P/N 3670-GRS-102-00, or P/N 3671-GRS-103-00 is prohibited. (i) As of the effective date of this AD, no person may install an ASCPC, P/N 1152972-4, on any airplane, unless it has had ASCPC OPS version P/N 3676-GRS-104-00 or later installed in accordance with paragraph (g) of this AD. Credit for Actions Done Using Previous Service Information (j) Actions accomplished before the effective date of this AD in accordance with Boeing Alert Service Bulletin 777-36A0026, dated December 19, 2006, are considered acceptable for compliance with the corresponding actions specified in this AD. Alternative Methods of Compliance (AMOCs) (k)(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 (l) You must use Boeing Service Bulletin 777-36A0026, Revision 1, dated February 8, 2007, 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 on April 18, 2007 (72 FR 15820, April 3, 2007). 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. Issued in Renton, Washington, on April 12, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 07-1936 Filed 4-16-07; 11:59 am] BILLING CODE 4910-13-P

This AD results from a report of an air supply and cabin pressure controller (ASCPC) failure during flight. We are issuing this AD to prevent an ASCPC failure that could stop airflow into the airplane, inhibit the cabin altitude warning message, and cause an incorrect display of cabin altitude. These failures could result in depressurization of the airplane without warning.