# SDR ASAA2019122231673

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2019
- Submitted: December 24, 2019
- Operation: Air carrier
- Aircraft: [N457AS](https://openairdocs.org/aircraft/N457AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36355
- Aircraft time: 23,214 hours, 7,524 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning Light
- Condition: False Activation
- Location: Rt A/C Pack
- 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/ASAA2019122231673

## Discrepancy

RIGHT PACK LIGHT CAME ON DURING MASTER CAUTION RECALL AND LIGHT WENT OUT ON MASTER CAUTION RE-SET. GROUNDED - YES.  PERFORMED FIM 21-53 TASK 821. ON NR 1 AND 2 PACK TEMP CONTROLLERS. ON PACK TEMP CONTROLLERS, NO FAULTS FOUND. ON ''VERIFY" GO" LIGHT ILLUMINATED. CANNOT DUPLICATE FAULT AT THIS TIME.

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