# SDR ASAA2016122319133

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2016
- Submitted: December 27, 2016
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 32,281 hours, 9,816 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016122319133

## Discrepancy

DURING MASTER CAUTION RECALL, CONTROL CABIN, FWD, AND AFT CABIN ZONE TEMP LIGHTS ILLUMINATED.  ON MASTER CAUTION RESET, ALL THREE ZONE TEMP LIGHT EXTINGUISHED. ACFT GROUNDED.   BITE OF NR 1 & 2 PACK ZONE TEMP CONTROLLERS SHOW FLT DECK & SELECTOR FAULTS FOR PREVIOUS FLT. BITE OF CONTROLLERS NORMAL IAW AMM 21-61-00-700-806-002.

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