# SDR ASAA2018073025548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2018
- Submitted: July 31, 2018
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 44,523 hours, 13,341 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 22128
- Condition: Failed
- Location: Ac Bay
- Part time: 13,718 hours, 4,211 cycles
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018073025548

## Discrepancy

UNABLE TO CONTROL CONT CAB TEMP SWINGS UP TO 20 DEGREES. GROUNDED - YES. REMOVED & REPLACED LT PACK TEMP CONTROL VALVE PER AMM 21-51-10-400-801. LEAK CK GOOD. CLEANED TEMP CONTROL CABIN TEMP SENSOR REF AMM 21-61-10. TESTS NORMAL.

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