What was found
RIGHT PACK LIGHT ILLUMINATES ON RECALL. GROUNDED-YES. RT ZONE TEMP CONTROLLER LOGGED TCV FAULT. REMOVED AND REPLACED RT PACK TEMP CONTROL VALVE, REF B737-900 AMM 21-51-10. OPERATIONS CHECK GOOD. LEAK CHECK GOOD.
- Difficulty date
- January 8, 2021
- Submitted
- January 12, 2021
- Operation
- Air carrier
- Aircraft
- N491AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44109
- Aircraft time
- 19,479 hours, 6,235 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Modulating Valve
- Part number
- 3989085
- Part serial
- 32865
- Condition
- Faulted
- Location
- Right Ecs Bay
- Part time
- 7,611 hours, 2,354 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.