Service difficulty report · Modulating Valve · Boeing 737990ER
FAA SDR system
- Difficulty date
- July 3, 2022
- Submitted
- July 7, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41727
- Aircraft time
- 22,639 hours, 7,106 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 20455
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 13,289 hours, 3,904 cycles
- Stage of operation
- NR
- How discovered
- V
- 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
ON RECALL ZONE TEMP LIGHT ILLUMINATES FOR CONT CAB LIGHT EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. CONFIRMED FAULT, R/H PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL FLIGHT DECK TCV (V143). REMOVED & REPLACED SAME REF B737-900 AMM 21-61-21. GROUND FUNCTIONAL CK NML PER AMM 21-61-00-700-806-002.