# SDR ASAA2017091921979

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 19, 2017
- Submitted: September 20, 2017
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 14,320 hours, 4,744 cycles
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin Temp
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017091921979

## Discrepancy

AFTER ENGINE START CHECKLIST- ON RECALL- ALL 3 CABIN ZONE TEMP LIGHTS ILLUMINATED. GROUNDED - YES. RESET NR 1 AND NR 2 ZONE TEMP CONTROLLERS, REF AMM 21-61-20. NO FAULTS NOTED.

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