# SDR ASAA2020072752932

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2020
- Submitted: July 27, 2020
- Operation: Air carrier
- Aircraft: [N462AS](https://openairdocs.org/aircraft/N462AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36362
- Aircraft time: 23,607 hours, 7,635 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Left A/C Pack
- Stage of operation: TX
- 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/ASAA2020072752932

## Discrepancy

ON RECALL AFTER START CHECK, LT PACK ILLUMINATED. RESET W/MASTER CAUTION PRESS. GROUNDED - YES. PZTC NR 1 BITE FAULTED "THIS PACK TCV" FIM 21-62 TASK 801, FAULT RESET PER FIM 21-62 TASK 831, OPS BOTH PACKS FOR 30 MINUTES, FULL COOL & FULL WARM, RECALL TEST & PZTC BITE TEST PASSED NO FAULT ACTIVE AMM 21-00-00, CLEARS MEL 21-32B.

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