Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- June 6, 2020
- Submitted
- June 8, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40715
- Aircraft time
- 19,419 hours, 6,186 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 1582
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 78,316 hours, 37,028 cycles
- Stage of operation
- NR
- 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
CONT CAB ZONE TEMP LIGHT ON RECALL. GOES OUT ON RESET. GROUNDED - YES. CONFIRMED FAULT, "CONT CAB ZONE" TEMP LIGHT ILLUMINATES ON RECALL. NR 2 PACK/ZONE TEMP CONTROLLER BITE SHOWS HARD FAIL "FLIGHT DECK TCV" (V143). REMOVED & REPLACED FLIGHT DECK TCV REF AMM 21-61-21, LEAK CK & OPS CK NML REF AMM 21-61-00-700-806-002. NR 1 PACK/ZONE TEMP CONTROLLER SHOWS NO FAULTS.