# SDR ASAA2015082412887

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2015
- Submitted: August 26, 2015
- Operation: Air carrier
- Aircraft: [N537AS](https://openairdocs.org/aircraft/N537AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35204
- Aircraft time: 14,316 hours, 4,285 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 5416744
- Part serial: 15778
- Condition: Failed
- Location: Ram Air Exhaust
- Part time: 14,321 hours, 4,286 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015082412887

## Discrepancy

WHEN MASTER CAUTION RECALL IS PUSHED, THE RT PACK LIGHT ILLUMINATES, EXTINGUISHES WHEN THE MASTER CAUTION SYSTEM IS RESET.  ACFT GROUNDED. NR 2 PACK/ZONE TEMP CONTROLLER FAULTS RAM AIR ACTUATOR.  REPLACED NR 2 PACK/ZONE RAM ACTUATOR, REF AMM 21-51-21. OPS CHECK & BITE TEST GOOD.

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