# SDR ASAA2019070429935

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2019
- Submitted: July 9, 2019
- Operation: Air carrier
- Aircraft: [N517AS](https://openairdocs.org/aircraft/N517AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35197
- Aircraft time: 40,342 hours, 11,943 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- 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/ASAA2019070429935

## Discrepancy

ON RECALL, LEFT PACK LIGHT ILLUMINATED, EXTINGUISHES ON RECALL. GROUNDED - YES. REF AMM TASK 21-61-00-700-806-002, NO.1 PZTC BITE PREV FLT LOGGED "THIS PACK TCV" FAULT. GVI TCV VALVE INTEGRITY OK. FAULT RESETABLE, BOTH PZTC BITE VERIFY GOOD W/O FAULTS. LEFT PACK OPS CHECKED NORMAL IN ALL TEMP RANGE ON GND.

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