# SDR ASAA2019022518275

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2019
- Submitted: February 26, 2019
- Operation: Air carrier
- Aircraft: [N563AS](https://openairdocs.org/aircraft/N563AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35180
- Aircraft time: 46,590 hours, 13,950 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Warning Light
- Condition: False Activation
- Location: Cockpit Temp
- Stage of operation: TX
- 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/ASAA2019022518275

## Discrepancy

AFTER ENGINE START CONT CAB ZONE TEMP LITE ILLUMINATED WILL NOT EXTINGUISH AFTER FOLLOWING QRH. GROUNDED - YES. REF B737-800 FIM 21-61 TASK 801, #1 PZTC BITE TEST PASSED NO FAULT NOTED, #2 PZTC BITE TEST FAULTED FLT DECK TRIM VALVE, NO ACTIVE FAULT SHOWS AFTER #2 PZTC RESET, BOTH PACKS OPS TES NORMAL REF B737-800 AMM 21-61-00, CLEARS MEL 21-21G.

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