# SDR ASAA2020012181893

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2020
- Submitted: January 22, 2020
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 18,266 hours, 5,856 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: 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/ASAA2020012181893

## Discrepancy

ON RECALL CONT CAB ZONE TEMP ILLUMINATES & GOES OUT ON MASTER CONTROL RESET. GROUNDED - YES. T/S SYSTEM  AMM 21-61-00-700-806-002, AND AMM TASK 21-61-00-700-807-002.  OPS CHECKED GOOD.

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