Service difficulty report · Control Valve · Boeing 737890

Difficulty date
September 9, 2022
Submitted
September 12, 2022
Operation
Air carrier
Aircraft
N589AS
Make and model
Boeing 737890
Aircraft serial
35686
Aircraft time
53,623 hours, 15,747 cycles
Part
Control Valve
Part number
3989083
Part serial
2397
Condition
Faulty
Location
Left Ecs Bay
Part time
78,793 hours, 34,849 cycles
Stage of operation
TX
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

AFTER ENGINE START LEFT PACK LIGHT ILLUMINATED UPON MASTER CAUTION RECALL. LIGHT EXTINGUISHED UPON MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED LH TCV REF B737-800 AMM 21-51-10.