Service difficulty report · Autothrottle Sys · Boeing 737890

Difficulty date
September 29, 2016
Submitted
October 3, 2016
Operation
Air carrier
Aircraft
N590AS
Make and model
Boeing 737890
Aircraft serial
35687
Aircraft time
33,401 hours, 10,124 cycles
Part
Autothrottle Sys
Condition
Malfunctioned
Stage of operation
CR
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 DISENGAGED INFLIGHT WOULD RE-ENGAGE. ACFT GROUNDED. VERIFIED FAULT 22-31687 FOUND IN INFLIGHT FAULTS DURING AUTO THROTTLE FAULT REVIEW. PERFORMED FIM 22-32 TASK 819 INITIAL EVALUATION AND FAULT DID NOT RE-OCCUR IN CURRENT STATUS AFTER AUTOTHROTTLE DC1 CIRCUIT BREAKER RESET AND AUTOTHROTTLE SERVO TEST. PERFORMED AUTO THROTTLE OPERATIONAL TEST IAW AMM 22-31-00. NO NEW FAULTS, OPS TESTED GOOD.