# SDR ASAA2017080921594

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 9, 2017
- Submitted: August 11, 2017
- Operation: Air carrier
- Aircraft: [N562AS](https://openairdocs.org/aircraft/N562AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35091
- Aircraft time: 41,864 hours, 12,455 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 20534
- Condition: Failed
- Location: Lt A/C Pack
- Part time: 12,319 hours, 3,622 cycles
- Stage of operation: CR
- 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/ASAA2017080921594

## Discrepancy

DURING FLIGHT, THE LT PACK LIGHT ILLUMINATED, ONLY ON RECALL. THE LIGHT WENT OUT UPON MASTER CAUTION RESET. ACFT GROUNDED.   LT PACK . BITE CHECKED AND TEMP CONTROL TCV AT FAULT. REMOVED AND REPLACED TEMP CONTROL VALVE IAW AMM 21-51-10.

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