Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- April 1, 2020
- Submitted
- April 3, 2020
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44107
- Aircraft time
- 18,161 hours, 5,811 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 24969
- Condition
- Failed
- Location
- Ac Bay
- Part time
- 18,173 hours, 5,814 cycles
- Stage of operation
- CL
- 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 ILLUMINATED DURING CLIMB. MASTER CAUTION RESET EXTINGUISHES THE LIGHT. 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. L/H PACK/ZONE TEMP CONTROLLER SHOWS NO FAULTS. AIRCRAFT RELEASED FROM MEL 21-21G.