What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATED ON MASTER RECALL LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED FD ZONE TRIM AIR MODULATING VALVE REF B737-900 AMM TASK 21-61-21.
- Difficulty date
- March 24, 2023
- Submitted
- March 28, 2023
- Operation
- Air carrier
- Aircraft
- N409AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41733
- Aircraft time
- 36,511 hours, 11,646 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989083
- Part serial
- 11169
- Condition
- Faulted
- Location
- Lt Ecs Bay
- Part time
- 47,952 hours, 14,893 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.