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Mon, Aug 29, 2005

Emergency AD: Boeing

AD NUMBER: PL2005-18-51
MANUFACTURER:
Boeing
SUBJECT: Airworthiness Directive PL2005-18-51
SUMMARY: On April 29, 2005, the FAA issued AD 2005-10-03, amendment 39-14080 (70 FR 24703, May 11, 2005), for certain Boeing Model 777-200 and -300 series airplanes.

That AD requires modification of the operational program software (OPS) of the air data inertial reference unit (ADIRU) from software version part number (P/N) 3470-HNC-100-03 to software version P/N 3475-HNC-100-06 or 3474-HNC-100-07. That AD resulted from a report of the display of erroneous heading information to the pilot due to a defect in the OPS of the ADIRU. We issued that 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.

FMI: www.avantext.com/DailyADIndex.ASP?AD=PL20051851

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