# SDR ASAA2019011727834

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2019
- Submitted: January 23, 2019
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 39,915 hours, 11,994 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Malfunctioned
- Location: Ac Bay
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019011727834

## Discrepancy

RIGHT PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. GOES OUT ON RESET. GROUNDED - YES. REF AMM 21-61-00-700-806-002, PERFORMED NR 1 PZTC BITE TEST FOUND TCV LOGGED AND RESET FAULT, NO FAULT FOUND ON NR 2 PZTC. RAN BOTH PACKS AT FULL COLD & FULL WARM FOR 30 MINUTES, REF AMM 21-61-00-700-807-002, RECALL TEST GOOD.

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