What was found
AFTER START, UPON RECALL, BOTH CONT CAB AND AFT CAB ILLUMINATED. RESET WITH MASTER CAUTION. GROUNDED - YES. REMOVED AND REPLACED ZONE TRIM AIR MODULATING VALVE IAW B737-800 AMM 21-61-21. OPS CHK GOOD. NO DEFECTS NOTED AT THIS TIME.
- Difficulty date
- March 12, 2022
- Submitted
- March 21, 2022
- Operation
- Air carrier
- Aircraft
- N590AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35687
- Aircraft time
- 51,589 hours, 15,384 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 20389
- Condition
- Faulty
- Location
- Left Ecs Bay
- Part time
- 25,868 hours, 9,039 cycles
- Stage of operation
- TX
- 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.