# SDR ASAA2019011727859

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2019
- Submitted: January 29, 2019
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 20,912 hours, 6,898 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000148686
- Condition: Failed
- Location: Lt Ram Air
- Part time: 239 hours, 73 cycles
- Stage of operation: CR
- 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/ASAA2019011727859

## Discrepancy

LEFT PACK LIGHT ILLUMINATED AT CRUISE FL 360. RESET NORMALLY AS PER QRH. GROUNDED - YES. REPLACED THE LEFT RAM AIR DOOR ACTUATOR PER AMM 21-51-21. OPS CK NORMAL.

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