# SDR ASAA2019021428194

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2019
- Submitted: February 20, 2019
- Operation: Air carrier
- Aircraft: [N536AS](https://openairdocs.org/aircraft/N536AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35203
- Aircraft time: 27,547 hours, 7,942 cycles
- System (JASC): [2161 · Cabin Temperature Controller](https://openairdocs.org/jasc/2161)
- 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/ASAA2019021428194

## Discrepancy

CONTROL ZONE TEMP OFF LIGHT ON. GOES OUT WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED A/C TEMP CONTROLLER BITE CHECK PER CONTROLLER PLACARD, ONE FAULT, NR 2 TEMP CONTROLLER FLT DECK TRIM VLV. RAN CONTROLLER BITE & RESET, NO FAULTS NOTED. RAN NR 2 CONTROLLER BITE 2 MORE TIMES, NO FAULTS NOTED. NO HISTORY LAST 30 DAYS.

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