Airworthiness Directive · Amendment 39-14080 · Boeing Model 777-200 and 777-300 Series Airplanes
Boeing Model 777-200 and 777-300 Series Airplanes
Superseded. A later AD replaced this one: AD 2005-18-51. Comply with the one in force.
This AD applies to Boeing Model 777-200 and -300 series airplanes, certificated in any category; as listed in Boeing Service Bulletin 777-34A0082, Revision 1, dated December 19, 2002.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777-200 and -300 series airplanes. This AD requires modification of the operational program software (OPS) of the air data inertial reference unit (ADIRU). This AD is prompted by a report of the display of erroneous heading information to the pilot due to a defect in the OPS of the ADIRU. We are issuing this AD to prevent the display of erroneous heading information to the pilot, which could result in loss of the main sources of attitude data, consequent high pilot workload, and subsequent deviation from the intended flight path.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 6 months after the effective date of this AD: Modify the OPS of the ADIRU by doing the applicable actions specified in the Accomplishment Instructions of Boeing Service Bulletin 777-34A0082, Revision 1, dated December 19, 2002, or Boeing Service Bulletin 777-34-0094, dated June 10, 2004.
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
