- Difficulty date
- February 28, 2023
- Submitted
- March 6, 2023
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 36578
- Aircraft time
- 45,864 hours, 13,371 cycles
- Part
- Valve
- Part number
- 3989085
- Part serial
- 26099
- Condition
- Failed
- Location
- Left Ecs Bay
- Part time
- 22,798 hours, 6,824 cycles
- Stage of operation
- NR
- 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
ON MASTER RECALL CONT CAB ZONE TEMP LIGHT ILLUMINATED. GROUNDED - YES. CONFIRMED FAULT, CONT CAB ZONE TEMP LIGHT ILLUMINATES WHEN RECALLED. PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL FLIGHT DECK TCV (V143). REMOVED & REPLACED TCV REF B737-800 AMM 21-61-21.