# SDR ASAA2019020628104

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 6, 2019
- Submitted: February 9, 2019
- Operation: Air carrier
- Aircraft: [N518AS](https://openairdocs.org/aircraft/N518AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35693
- Aircraft time: 38,430 hours, 11,438 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Valve
- Condition: Faulted
- 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/ASAA2019020628104

## Discrepancy

CONTROL CAB SINGLE CHANNEL ZONE TEMP FAILURE LIGHT ILLUMINATED ON RECALL AND EXTINGUISHED ON RESET. GROUNDED - YES. NR 2 PZTC BITE FREV FLT SHOWS FLT DECK TRIM VALVE FAULT, RESET FAULT. VERIFIED BOTH PACKS OPS CHECKED NORMAL ON GND WITHOUT FAULTS. NR 1 AND NR 2 PZTC BITE VERIFIED GOOD WITHOUT FAULTS.

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