SDR ASAA2020013082020

Service difficulty report · Autothrottle Sys · Boeing 737890

Difficulty date: January 28, 2020
Submitted: January 31, 2020
Operation: Air carrier
Aircraft: N583AS
Make and model: Boeing 737890
Aircraft serial: 35681
Aircraft time: 47,489 hours, 13,888 cycles
System (JASC): 2230 · Auto Throttle System
Part: Autothrottle Sys
Condition: Disengaged
Stage of operation: CL
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

AUTOTHROTTLE DISENGAGED AT 100 FT, UNABLE TO RE-ENGAGE THROUGHOUT FLIGHT. GROUNDED - YES. ACCOMPLISHED AUTOTHROTTLE BITE IAW FIM 22-31 TASK 801. ALL TESTS PASSED. ACCOMPLISHED LRU REPLACEMENT TEST FOR DFCS IAW AMM 22-11-00-740-815. ALL TESTS PASSED. ACCOMPLISHED LAND VERIFY TEST IAW AMM 23-11-00-700-801. ALL TESTS PASSED.