# SDR ASAA2021123137038

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2021
- Submitted: January 4, 2022
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 47,003 hours, 13,832 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2021123137038

## Discrepancy

CONT CAB ZONE TEMP LIGHT ILLUMINATES ON RECALL. GROUNDED - YES. FOUND PZTC2 FLT DECK TRIM VALVE FAULT REF B737-800 FIM 21-62 TASK 832 FAULT CLEARED ON VERIFY. REPLACED FLIGHT DECK SENSOR FILTER WITH NEW AND CLEANED SENSOR OP CK GOOD.

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