# SDR ASAA2023012641659

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 24, 2023
- Submitted: January 27, 2023
- Operation: Air carrier
- Aircraft: [N584AS](https://openairdocs.org/aircraft/N584AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35682
- Aircraft time: 55,891 hours, 16,481 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Sensor
- Condition: Dirty
- Location: Cabin Temp
- 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/ASAA2023012641659

## Discrepancy

CONTINUOUS ZONE TEMP ANNUNCIATOR ON TAXI, MASTER RECALL GOES OUT WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PZTC BITE REF FIM 21-62 TASK 801. ON BOTH PZTC FLT DECK TRIM VALVE FAULTED. PUSHED VERIFY ON BOTH PZTC AND FAULTS CLEARED. FOUND FLIGHT DECK TEMP SENSOR DIRTY. PERFORMED CLEANING REF B737-800 AMM 21-61-10. OPERATED PACKS. NO FAULTS NOTED.

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