# SDR ASAA2023040242661

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2023
- Submitted: April 3, 2023
- Operation: Air carrier
- Aircraft: [N928AK](https://openairdocs.org/aircraft/N928AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44099
- Aircraft time: 4,319 hours, 1,237 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/ASAA2023040242661

## Discrepancy

"MAINT" LIGHT ILLUMINATED. GROUNDED - YES. INTERROGATED FAULTS AND FOUND FAULT 21-65151, CONTROL CABIN TRIM VALVE SIGNAL IS OUT OF RANGE OR VALVE IS NOT IN COMMANDED POSITION. C/W B737-9 IFIM TASK 21-61-00. FAULT IS INTERMITTENT. MAINTENANCE LIGHT EXTINGUISHED. NO FURTHER DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.