- Difficulty date
- December 29, 2021
- Submitted
- January 4, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 39044
- Aircraft time
- 47,562 hours, 14,181 cycles
- Part
- Valve
- Part number
- 3989085
- Part serial
- 20282
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 26,782 hours, 8,781 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP CONT CAB SINGLE CHANNEL FAILURE. GROUNDED - YES. CONFIRMED FAULT, CONTROL CABIN ZONE TEMP LIGHT ILLUMINATES WHEN RECALLED. #2 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL "FLIGHT DECK TCV". REMOVED & REPLACED "FLIGHT DECK TCV (V143)" REF B737-800 AMM 21-61-21, OPS CK NML PER AMM 21-61-00-700-806-02.