# SDR ASAA2020101233344

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 12, 2020
- Submitted: October 14, 2020
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 24,241 hours, 7,838 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: TX
- 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/ASAA2020101233344

## Discrepancy

CONT CAB "ZONE TEMP" CAME ON AT RECALL AFTER ENGINE START.  GROUNDED-YES.   REF B737-900 FIM 21-62 TASK 842, NR 2 PZTC PREVIOUS FLIGHT FAULT LOGGED FLIGHT DECK TRIM VALVE FAULT.  FAULT RESET, BOTH PACKS OPERATIONS CHECKED NORMAL ON GROUND IN ALL TEMPERATURE RANGE.  NR 1 AND NR 2 PZTC BITE TESTED NORMAL W/O FAULTS.

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