Airworthiness Directives; Boeing Model 777-200 and 777-300 Series Airplanes
airworthiness · Rule · Final rule. · Published 2005-05-11 · Effective 2005-06-15 · 70 FR 24703
Document
Document number
05-9198
Federal Register citation
70 FR 24703
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Boeing Model 777-200 and 777-300 Series
Publication date
2005-05-11
Effective date
2005-06-15
FAA docket
Docket No. FAA-2005-20081
Abstract
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.