# SDR ASAA2020122833778

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2020
- Submitted: December 30, 2020
- Operation: Air carrier
- Aircraft: [N409AS](https://openairdocs.org/aircraft/N409AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41733
- Aircraft time: 28,996 hours, 9,375 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 12877
- Condition: Faulted
- Location: Lt Ram Air Inlet
- Part time: 43,713 hours, 13,035 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020122833778

## Discrepancy

LEFT PACK LIGHT ILLUMINATED.  EXTINGUISHED WHEN MASTER CAUTION LIGHT IS RESET.  GROUNDED-YES.  ACCOMPLISHED NR 1 PACK TEMP CONTROL BITE AND HAD RAM AIR ACTUATOR FAULT, REF B737-900 FIM 21-62 TASK 801.  REMOVED AND REPLACED LT RAM AIR INLET ACTUATOR, REF B737-900 AMM 21-51-21.  OPERATIONS CHECK GOOD WITH NO FAULTS FOUND.  GROUND VERIFICATION SUCCESSFUL.

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