# SDR 9JLA202102258166

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2021
- Submitted: February 25, 2021
- Operation: Air carrier
- Aircraft: [N831HS](https://openairdocs.org/aircraft/N831HS), registered now
- Make and model: Cessna 525B
- Registry model: [Cessna 525B](https://openairdocs.org/model/cessna-525b) (OpenAirDocs)
- Aircraft serial: 525B0216
- Aircraft time: 4,003 hours, 3,351 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Part number: 1E587
- Part serial: 58D63
- Condition: Defective
- Location: Cabin Temp
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA202102258166

## Discrepancy

THE FLIGHT CREW REPORTED THAT THE CABIN ENVIRONMENTAL TEMP REMAINED COLD DESPITE A HOT TEMP SELECTED ON THE AUTO-CONTROLLER.  THE MAINTENANCE TEAM DETERMINED THAT THE CABIN TEMP CONTROLLER BOX WAS DEFECTIVE.  THE CONTROL BOX WAS REMOVED AND A NEW CABIN TEMP CONTROL BOX WAS INSTALLED.  FUNCTIONAL CHECKS WERE SATISFACTORY.  THE AIRCRAFT WAS RETURNED TO SERVICE.

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