# SDR ASAA2019061189632

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2019
- Submitted: June 11, 2019
- Operation: Air carrier
- Aircraft: [N533AS](https://openairdocs.org/aircraft/N533AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35201
- Aircraft time: 33,044 hours, 9,621 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Message
- Condition: False Activation
- Location: Cockpit Temp
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019061189632

## Discrepancy

CONT CAB ZONE TEMP ILLUMINATES UPON RECALL. EXTINGUISHES UPON MASTER CAUTION RESET. GROUNDED - YES. REF B737-800 FIM 21-62 TASK 842, PZTC'S BITE PREV FLT SHOWS FLT DECK CABIN SENSOR FAULT. CLEANED AND GVI OF FLT DECK CABIN SENSOR, NO DEFECTS FOUND. BOTH PZTC BITE TESTED GOOD W/O FAULTS. BOTH PACKS OPS CHECKED NORMAL ON GND.

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