# SDR ASAA1057728

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 20, 2010
- Submitted: April 24, 2010
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 14,748 hours, 4,306 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 8295
- Condition: Faulty
- Location: Ac Pack
- Part time: 15,429 hours, 4,714 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA1057728

## Discrepancy

LEFT PACK LIGHT ILLUMINATED ON RECALL DURING LANDING CHECK LIST.  COMPLETED BITE CHECK AND VERIFIED L/PACK TEMP CONTROL VALVE FAULT.  REMOVED AND REPLACED L/PACK TEMP CONT VALVE PER 21 51 10.  COMPLETED LEAK CHECK.

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