Service difficulty report · Control Valve · Boeing 737890
FAA SDR system
- Difficulty date
- November 7, 2019
- Submitted
- November 13, 2019
- Operation
- Air carrier
- Make and model
- Boeing 737890
- Aircraft serial
- 41188
- Aircraft time
- 29,284 hours, 8,434 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 11324
- Condition
- Failed
- Location
- Rt A/C Pack
- Part time
- 39,368 hours, 11,527 cycles
- Stage of operation
- TX
- How discovered
- O
- 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
DURING PUSHBACK AND TAXI OUT, CABIN CONT ZONE TEMP LITE ILLUMINATES ON RECALL AND RESETS NORMALLY. GROUNDED - YES. CONFIRMED FAULT, R/H PACK/ZONE TEMP CONTROLLER SHOWS "FLIGHT DECK TCV" FAULTS, WOULD NOT RESET. L/H SHOWS NO FAULTS. REMOVED & REPLACED FLIGHT DECK TCV (V143) REF B737-800 AMM 21-61-21. PULLED & RESET 1 TOTAL C/B. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE TEST REF AMM 21-61-00-700-806-002, OPS CK NML.