Service difficulty report · Control Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- December 24, 2018
- Submitted
- December 27, 2018
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41733
- Aircraft time
- 23,647 hours, 7,787 cycles
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 25514
- Condition
- Failed
- Location
- Left Ecs Bay
- Part time
- 10,991 hours, 3,700 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
RECURRING CONTROL CAB ZONE LIGHT ON RECALL AFTER START. GROUNDED - YES. PACK/ZONE TEMP BITE SHOWS ON #2 CNTRLR FLT DECK TRIM VALVE FAULT. REMOVED & REPLACED FLIGHT DECK TRIM AIR VALVE REF B737-900 AMM 21-61-21. OPS CHECK & LEAK CHECK GOOD.