SDR ASAA2017021419816

Service difficulty report · Unknown · Boeing 737890

Difficulty date: February 14, 2017
Submitted: February 16, 2017
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 30,996 hours, 9,188 cycles
System (JASC): 2230 · Auto Throttle System
Part: Unknown
Condition: Malfunctioned
Location: Autotrottle Sys
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

AUTOTHROTTLES WILL NOT STAY ENGAGED. GROUNDED - YES. LAST FLT, A/T FLT FAULT SHOWS A/T ENG 28V DC INV 22-31543. PERFORMED FIM 22-31 TASK 802 / 22-31 TASK 801, A/T CURRENT STATUS AND A/T INTERACTIVE SERVO MOTOR TESTS NUMEROUS TIMES WITH NO FAULTS. NO HISTORY LAST 6 MONTHS. GROUND VERIFICATION TEST GOOD. REF LWMP SYSTEM TABLE: A/T OPERATIONAL TEST REF AMM 22-31-00 GOOD. A/C REMAINS CAT IIIA AUTOLAND AND HGS. STATUS SCREW SHOWS SAME.