# SDR ASAA2023111146109

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 11, 2023
- Submitted: November 13, 2023
- Operation: Air carrier
- Aircraft: [N487AS](https://openairdocs.org/aircraft/N487AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44108
- Aircraft time: 30,053 hours, 9,241 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/ASAA2023111146109

## Discrepancy

CONT CAB ZONE TEMP ILLUMINATED. EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. INTERROGATED PACK ZONE TEMP CONTROLLER FOUND TRIM VALVE FAULT. FAULT CLEARED AFTER TEST PER B737-900 FIM 21-62 TASK 801.

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