# SDR ASAA2021051034780

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 10, 2021
- Submitted: May 11, 2021
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 45,831 hours, 13,560 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/ASAA2021051034780

## Discrepancy

CONT ZONE TEMP LIGHT ON RECALL AFTER STARTUP. GROUNDED - YES. ACCOMPLISHED PZTC BITE CHECK FOUND FLIGHT DECK TAV FAULT ON #2 CONTROLLER. FAULT RESETS AFTER VERIFY TEST. RAN PACKS AND FAULT DOES NOT RETURN. REF B737-800 FIM 21-62 TASK 801.

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