Service difficulty report · Modulating Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- March 30, 2023
- Submitted
- April 4, 2023
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 36352
- Aircraft time
- 33,581 hours, 10,562 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 24604
- Condition
- Failed
- Location
- Lt Ecs Bay
- Part time
- 21,178 hours, 7,763 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AMBER ZONE TEMP LIGHT FOR CONT CAB ZONE ILLUMINATES ON MASTER CAUTION RECALL. LIGHT GOES OUT ON MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, "CONT CAB ZONE"" TEMP LIGHT ILLUMINATES WHEN RECALL PRESSED. #2 PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL "FLIGHT DECK" TCV (V143). REMOVED & REPLACED FLIGHT DECK TCV (V143) PER B737-900 AMM 21-61-21.