SDR ASAA2018081385723

Service difficulty report · Autothrottle Sys · Boeing 737890

Difficulty date: August 8, 2018
Submitted: August 13, 2018
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 39,595 hours, 12,137 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

AUTO THROTTLES WILL NOT STAY ENGAGED. ACFT GROUNDED. ACCOMPLISHED AN AUTOTHROTTLE BITE IAW FIM 22-31, TASK 801. CURRENT FAULTS SHOWS MESSAGES 22-31512, AND 22-31514, NO EEC DATA. ACCOMPLISHED FIM 22-31, TASK 806. EEC BITE SHOWS NO FAULTS, EEC GROUND TEST SHOWS NO FAULTS, AUTOTHROTTLE BITE SHOWS NO CURRENT FAULTS. CDS BITE SHOWS NO FAULTS. OPS TESTED NORMAL.