Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- January 18, 2022
- Submitted
- January 21, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41704
- Aircraft time
- 30,802 hours, 9,788 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 6697
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 63,918 hours, 25,030 cycles
- Stage of operation
- NR
- How discovered
- V
- 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
CONT CAB ZONE TEMP LIGHT ON RECALL. RESET EXTINGUISHES LIGHT. QRH COMPLETE. GROUNDED - YES. #2 PACK/ZONE TEMP CONTROLLER SHOWS "FLIGHT DECK TCV" (V143) FAULT. #1 CONTROLLER SHOWS NO FAULTS. REMOVED & REPLACED TCV REF B737-900 AMM 21-61-21, LK CK & GROUND FUNCTIONAL CK NML REF AMM 21-61-00-700-806-002.