# SDR ASAA2021012833972

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2021
- Submitted: February 1, 2021
- Operation: Air carrier
- Aircraft: [N464AS](https://openairdocs.org/aircraft/N464AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40714
- Aircraft time: 25,872 hours, 8,153 cycles
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- Part: Controller
- Condition: Fault Message
- Location: Flt Dk Trm Valve
- Stage of operation: TX
- 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/ASAA2021012833972

## Discrepancy

AFTER ENGINE START CONTROL CABIN ZONE AMBER ON, DOES RESET WITH MASTER CAUTION.  GROUNDED - YES.  INTERROGATED PACK CONTROLLERS, FOUND NR 2 SHOWING FLIGHT DECK TRIM AIR VALVE FAULT REF B737-900 AMM 21-61-00.  FAULT RESET WITH VERIFY RAN PACKS WITH NO FAULTS NOTED.

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