# SDR ASAA2023021441947

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 14, 2023
- Submitted: February 16, 2023
- Operation: Air carrier
- Aircraft: [N570AS](https://openairdocs.org/aircraft/N570AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35185
- Aircraft time: 57,988 hours, 17,306 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/ASAA2023021441947

## Discrepancy

CONT.CAB ZONE TEMP LIGHT COMES ON DURING MASTER CAUTION RECALL. GROUNDED - YES. ON CONT #2 FAULTED FLT DECK TRIM VLVE ON BIT AND PREV. FLT. FOUND FLIGHT DECK TEMP SENSOR DIRTY. CLEANED TEMP SENSOR REF B737-800 AMM 21-61-10. PERFORMED PZTC BITE AGAIN. NO FAULTS. OPERATED BOTH PACKS, STILL NO FAULTS.

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