Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- April 2, 2020
- Submitted
- April 6, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41702
- Aircraft time
- 22,379 hours, 7,233 cycles
- Part
- Control Valve
- Part number
- 3989083
- Part serial
- 16570
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 30,925 hours, 9,621 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
AFTER START CHECKLIST RECALL CONT CAB ZONE TEMP LIGHT ILLUMINATED. EXTINGUISHES WITH MASTER CAUTION PRESS. GROUNDED - YES. CONFIRMED FAULT, R/H PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL FLIGHT DECK TCV (V143). REMOVED & REPLACED FLIGHT DECK TCV REF B737-900 AMM 21-61-21, LK CK & OPS CK NML REF AMM 21-61-00-700-806-002.