# SDR ASAA2022013037319

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2022
- Submitted: February 3, 2022
- Operation: Air carrier
- Aircraft: [N583AS](https://openairdocs.org/aircraft/N583AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35681
- Aircraft time: 50,661 hours, 14,786 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/ASAA2022013037319

## Discrepancy

CONT CABIN ZONE TEMP INTERMITTENT LIGHT AFTER START RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PZTC BITE REF B737-800 FIM 21-62 TASK 801. CONTROLLER 2 FAULTED FLT DECK TRIM VALVE ON BIT AND PREV FLT. FAULT CLEARED WHEN PUSHED VERIFY. GREEN GO LIGHT ILLUMINATED. PERFORMED FLT DECK TEMP SENSOR CLEANING DUE TO DIRTY WITH DUST/ DEBRIS REF B737-800 AMM 21-61-10. OPERATED BOTH PACKS FOR 10 MIN. PERFORMED PZTC BITE AGAIN. NO FAULTS NOTED.

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