Service difficulty report · Modulating Valve · Boeing 737900ER
FAA SDR system
- Difficulty date
- February 9, 2022
- Submitted
- February 12, 2022
- Operation
- Air carrier
- Make and model
- Boeing 737900ER
- Aircraft serial
- 41732
- Aircraft time
- 33,743 hours, 10,729 cycles
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 2245
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 94,435 hours, 40,265 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
CONT CAB ZONE TEMP ILLUMINATED. GROUNDED - YES. CONFIRMED FAULT, FLIGHT DECK TCV (V143) FAILS BITE TEST #2 PACK/ZONE TEMP CONTROLLER. REMOVED & REPLACED SAME PER B737-900 AMM 21-61-21. GROUND FUNCTIONAL CK NML REF AMM 21-51-00-700-803.