# SDR ASAA2020022082216

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2020
- Submitted: February 21, 2020
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 18,280 hours, 5,912 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Cockpit 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/ASAA2020022082216

## Discrepancy

CONT CAB ZONE TEMP ON AFTER START CHECK LIST. GROUNDED - YES. #2 ZTC LOGGED FLT DECK TRIM AIR VALVE. BITE TESTS GOOD - FAULT RESET.

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