# SDR ASAA2017102722343

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 27, 2017
- Submitted: October 30, 2017
- Operation: Air carrier
- Aircraft: [N537AS](https://openairdocs.org/aircraft/N537AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35204
- Aircraft time: 22,777 hours, 6,626 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 15760
- Condition: Failed
- Location: Lt Ram Air
- Part time: 22,777 hours, 6,626 cycles
- Stage of operation: TX
- 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/ASAA2017102722343

## Discrepancy

AFTER ENGINE START, ON RECALL, LEFT PACK LIGHT ILLUMINATED. PACK LIGHT EXTINGUISHED ON MASTER CAUTION RESET.  ACFT GROUNDED.  PERFORMED ZONE TEMP/CONTROL BITE TEST. FAULTED THE RAM ACTUATOR. COULD NOT RESET.  R & R LT PACK RAM AIR ACTUATOR IAW AMM 21-51-21. OPS NORMAL. PACK LIGHT CLEARED.

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