Service difficulty report · Electronic Unit · Boeing 737990ER

Difficulty date
September 2, 2021
Submitted
September 7, 2021
Operation
Air carrier
Aircraft
N491AS
Make and model
Boeing 737990ER
Aircraft serial
44109
Aircraft time
21,434 hours, 6,843 cycles
Part
Electronic Unit
Part number
2042M67P04
Part serial
FFFB4440
Condition
Failed
Location
Autothrottle
Part time
21,479 hours, 6,855 cycles
Stage of operation
NR
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

AUTO THROTTLE WILL NOT ARM. GROUNDED - YES. FOUND EEC FAILURE DURING BITE. REF LOGPAGE 60212447 FOR EEC REPLACEMENT. PERFORMED REPAIR CONFIRMATION REF B737-900 AMM 22-31 TASK 801. ETOPS GROUND VERIFICATION GOOD.