Service difficulty report · Computer · Boeing 737990ER

Difficulty date
May 25, 2016
Submitted
May 27, 2016
Operation
Air carrier
Aircraft
N491AS
Make and model
Boeing 737990ER
Aircraft serial
44109
Aircraft time
1,893 hours, 636 cycles
Part
Computer
Part number
305RAA1
Part serial
AS11367
Condition
Failed
Location
Throttle
Part time
1,917 hours, 641 cycles
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AUTOTHROTTLES DISENGAGES AFTER PUSHING TOGA. ACFT GROUNDED. PERFORMED A/T BITE, NO CURRENT FAULTS LOGGED. REVIEWED FAULT HISTORY AND FOUND FAULT MESSAGE 22-31794 LOGGED 7 TIMES. ACCOMPLISHED FIM 22-31, TASK 805. REMOVED AND INSTALLED NEW ASM NR 1. REF AMM 22-31-91-020-801. ACCOMPLISHED A/T STEP H, INSTALLATION TEST, REF AMM 22-31-91-400-801. ALL TESTS PASSED.