Service difficulty report · Warning Message · Boeing 737990ER

Difficulty date
March 30, 2021
Submitted
March 31, 2021
Operation
Air carrier
Aircraft
N423AS
Make and model
Boeing 737990ER
Aircraft serial
35206
Aircraft time
28,796 hours, 9,254 cycles
Part
Warning Message
Condition
False Activation
Location
Cockpit Temp
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
D

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

UPON RECALL: CONT CAB: ZONE TEMP LIGHT RAN QRH, NO CHANGE. GROUNDED - YES. BITE OF NR 2 PACK TEMP CONTROLLER SHOW, FLT DECK TRIM VALVE FAULT BITE OF CONTROLLER PASS REF B737-800 AMM 21-61-20-400-801. FAULT CLEARS AND NO NEW FAULTS.