SDR ASAA2013100396098

Service difficulty report · Autothrottle Sys · Boeing 737890

Difficulty date: October 3, 2013
Submitted: October 8, 2013
Operation: Air carrier
Aircraft: N519AS
Make and model: Boeing 737890
Aircraft serial: 36482
Aircraft time: 18,056 hours, 5,373 cycles
System (JASC): 2230 · Auto Throttle System
Part: Autothrottle Sys
Condition: Malfunctioned
Stage of operation: NR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

INFLIGHT, AUTO-THROTTLES FAIL LIGHT ILLUMINATED AND AUTO THROTTLES DISENGAGED. WOULD ENGAGE FOR A FEW SECONDS THEN DISENGAGE. ACFT GROUNDED. COULD NOT DUPLICATE. A/T FAULT, REVIEW LOGGED NR 1 ASM FAULT NR 22-31687 ON FLT 14, 4 TIMES ONLY. ACCOMP FIM 22-32/819, A/T CURRENT STATUS CK & TORQUE CK NORMAL. ALSO, ACCOMP SEVERAL TIMES SERVO MOTOR TEST REF MM22-31-00 STEP I, TEST NORMAL. NO HISTORY 30 DAYS.