What was found
AFT CABIN ZONE TEMP ON RECALL. GROUNDED-YES. PERFORMED B737-900 FIM 21-62 TASK 801. FOUND AFT ZONE TRIM VALVE FAULT. PERFORMED FIM 21-62 TASK 835 AND AFT CABIN TRIM AIR VALVE FAULT RESET. NO FURTHER ACTION NECESSARY.
- Difficulty date
- November 29, 2020
- Submitted
- December 1, 2020
- Operation
- Air carrier
- Aircraft
- N471AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41703
- Aircraft time
- 23,612 hours, 7,538 cycles
- System (JASC)
- 2160 · Cabin Temperature Control System
- Part
- Valve
- Condition
- Faulted
- Location
- Trim Air
- 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.