# SDR ASAA2019062729837

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 27, 2019
- Submitted: July 1, 2019
- Operation: Air carrier
- Aircraft: [N407AS](https://openairdocs.org/aircraft/N407AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41731
- Aircraft time: 26,229 hours, 8,404 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: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019062729837

## Discrepancy

LEFT PACK LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED FIM 21-53 TASK 801. FOUND NO PACK LIGHT ON. PERFORMED PZTC BITE IAW FIM 21-62 TASK 801. FOUND NO FAULTS. FOUND NO EVIDENCE OF LEAKING PACK FLOW VALVE.

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