# SDR ASAA2023030542189

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2023
- Submitted: March 6, 2023
- Operation: Air carrier
- Aircraft: [N920AK](https://openairdocs.org/aircraft/N920AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44086
- Aircraft time: 5,300 hours, 1,571 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023030542189

## Discrepancy

PILOT REPORTS MAINT LIGHT ON. GROUNDED - YES. INTERROGATED OMF, FOUND MAINT MESSAGE 21-65151 FOR CONT CAB TRIM VALVE SIGNAL OUT OF RANGE OR NOT IN COMMANDED POSITION. PERFORMED OPS TEST PER B737-9 IFIM 21-61-00-810-840. MAINT MESSAGE CLEARED.

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