# SDR ASAA2021110836554

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2021
- Submitted: November 10, 2021
- Operation: Air carrier
- Aircraft: [N442AS](https://openairdocs.org/aircraft/N442AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43293
- Aircraft time: 29,845 hours, 9,544 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: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021110836554

## Discrepancy

ZONE TEMP CONT CAB ILLUMINATES DURING RECALL ALONG WITH MASTER CAUTION LIGHT. BOTH LIGHTS EXTINGUISH WHEN MASTER CAUTION LIGHT IS RESET. CABIN TEMP IS CONTROLLABLE. GROUNDED - YES. ACCOMPLISHED BITE FOUND FLIGHT DECK TRIM VALVE FAULT RAN B737-900 FIM 21-62 TASK 833 FAULT RESET.

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