Airworthiness Directives; Boeing Model 777 Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 2007-04-03 · Effective 2007-04-18 · 72 FR 15820
Document
Document number
E7-5897
Federal Register citation
72 FR 15820
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Boeing Model 777
Publication date
2007-04-03
Effective date
2007-04-18
FAA docket
Docket No. FAA-2007-27736
Abstract
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.