# SDR ASAA2022030637635

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2022
- Submitted: March 9, 2022
- Operation: Air carrier
- Aircraft: [N506AS](https://openairdocs.org/aircraft/N506AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35690
- Aircraft time: 49,664 hours, 14,993 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: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022030637635

## Discrepancy

CONT CAB ZONE TEMP ILLUMINATES ON MASTER CAUTION RECALL. LIGHT EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. REF B737-800 FIM 21-62 TASK 842, #2 PZTC PREV FLT LOGGED FLT DECK TRIM VALVE FAULT, PZTC BITE VERIFY TESTED GOOD W/O FAULTS. VERIFIED BOTH PACKS OPS CHECKED NORMAL ON GND IN ALL TEMPERATURES RANGE.

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