# SDR ASAA2019012127891

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2019
- Submitted: January 24, 2019
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 46,052 hours, 13,795 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: CR
- 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/ASAA2019012127891

## Discrepancy

DURING CRUISE LEFT PACK LIGHT ILLUMINATED. PACK LIGHT DID NOT DO OUT W/ TRIM RESET, DID GO OUT WITH MASTER CAUTION RESET. GROUNDED - YES. T/S PER FIM 21-53 TASK 801 - OPS CKS NML. BITE CK / VERIFY OF PACK CONTROLLERS GOOD. HISTORY SHOWED RT RAM AIR DOOR ACTUATOR INTMT FAULT. OPS CK OF BOTH PACS & IND NML.

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