Service difficulty report · Autothrottle Sys · Boeing 737990ER

Difficulty date
July 7, 2019
Submitted
August 6, 2019
Operation
Air carrier
Aircraft
N457AS
Make and model
Boeing 737990ER
Aircraft serial
36355
Aircraft time
21,770 hours, 7,110 cycles
Engine
Cfmint CFM567B27E
Part
Autothrottle Sys
Condition
Unknown
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-THROTTLE WILL NOT STAY ENGAGED IN FLIGHT. GROUNDED - YES. PERFORMED A/T SYSTEM AND OPERATIONAL TEST, BOTH CHECKED GOOD IAW AMM 22-31-00-710-801, 22-31-00-710-802.