Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- May 4, 2022
- Submitted
- May 6, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 35192
- Aircraft time
- 48,400 hours, 14,413 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 20383
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 26,213 hours, 7,969 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
CONT CAB "ZONE TEMP" LIGHT ILLUMINATES ON MC RECALL. GROUNDED - YES. ACCOMPLISHED PZTC BITE REF B737-800 AMM 21-61-00-700-806-002. PREV HISTORY SHOWS FAULT FOR FLT DECK TRIM VALVE. FAULT CLEARED UPON VERIFICATION. REMOVED & REPLACED TCV FOR CONT CABIN REF AMM 21-61-21-400-801. 1 EA C/B OPENED & CLOSED. LEAK CK GOOD. ACCOMPLISHED PZTC BITE REF AMM 21-61-00-700-806-002. NO FAULTS NOTED. GROUND VERIFICATION SUCCESSFUL.