What was found
UPON RECALL CONT CAB ZONE TEMP LIGHT CAME ON. GROUNDED - YES. REMOVED AND REPLACED CABIN TRIM MODULATING VALVE PER B737-900 AMM TASK 21-61-21, BITE LEAK AND OPS TESTS GOOD.
- Difficulty date
- December 16, 2018
- Submitted
- December 20, 2018
- Operation
- Air carrier
- Aircraft
- N478AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44105
- Aircraft time
- 13,729 hours, 4,601 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Control Valve
- Part number
- 3989085
- Part serial
- 9102
- Condition
- Failed
- Location
- Right Ecs Bay
- Part time
- 44,031 hours, 14,182 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.