# SDR ASAA2016020315276

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 3, 2016
- Submitted: February 5, 2016
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 36,373 hours, 10,843 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Message
- Condition: False Activation
- Location: Cabin Temp
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016020315276

## Discrepancy

UPON RECALL AFTER START CHECK RECEIVED ZONE TEMP LIGHT ON CONTROLLER CABIN.  LIGHT EXTINGUISHES ON MASTER CAUTION RESET.  ACFT GROUNDED.  PERFORMED ZONE TEMP CONTROLLER BITE CHECK ON NR 1 & 2 CONTROLLER.  FOUND FLIGHT DECK TRIM VALVE FAULT ON ZTC 2.  CLEARED FAULT, AND COULD NOT DUPLICATE.  OPERATED PACK SYS WITH NO FAULTS, RECALL CHECKS NORMAL AMM 21-61-00.

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