# SDR ASAA2020101333349

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2020
- Submitted: October 14, 2020
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 30,321 hours, 9,586 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Lt A/C Pack
- 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/ASAA2020101333349

## Discrepancy

AFTER START, ON RECALL, THE LEFT PACK LIGHT & CONT CABIN ZONE TEMP LIGHT REMAINED ILLUMINATED.  LIGHT EXTINGUISHED WHEN MASTER CAUTION RESET WAS PUSHED.  GROUNDED-YES.  NR 2 ZTC LOGGED FLIGHT DECK TRIM VALVE.  BITE TEST GOOD FAULT RESET.

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