# SDR ASAA2017042420526

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2017
- Submitted: April 26, 2017
- Operation: Air carrier
- Aircraft: [N558AS](https://openairdocs.org/aircraft/N558AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35177
- Aircraft time: 41,387 hours, 12,131 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: NR
- 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/ASAA2017042420526

## Discrepancy

ZONE TEMP, CONT CAB ILLUMINATED ON RECALL. LIGHT EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. FLIGHT DECK TRIM VALVE FAULT ON NR 2 ZONE TEMP CONTROLLER RESET & TESTS NORMAL PER FIM 21-62 TASK 801. GROUND VERIFICATION SUCCESSFUL.

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