Airworthiness Directive · Amendment 39-15010 · Boeing Model 777 Airplanes
Boeing Model 777 Airplanes
Superseded. A later AD replaced this one: AD 2007-07-05 R1. Comply with the one in force.
This AD applies to all Boeing Model 777-200, -200LR, -300, and -300ER series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 777 airplanes. This AD requires a one-time inspection to determine the part number of the left and right air supply and cabin pressure controllers (ASCPCs) and installation of new ASCPC software if necessary. This AD results from a report of an 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.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
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.
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.
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 111152972-4, on any airplane, unless it has had ASCPC OPS P/N 3676-GRS-104-00 installed in accordance with paragraph (g) of this AD.
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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
