What was found
CONT CAB ZONE TEMP LIGHT ON MASTER CAUTION TEST AFTER START. LIGHT GOES OUT WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED & REPLACED TCV REF B737-900 AMM 21-61-21.
- Difficulty date
- October 26, 2022
- Submitted
- October 31, 2022
- Operation
- Air carrier
- Aircraft
- N433AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41704
- Aircraft time
- 33,562 hours, 10,622 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 29947
- Condition
- Failed
- Location
- Left Ecs Bay
- Part time
- 17,701 hours, 5,687 cycles
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.