# SDR ASAA2018100926439

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2018
- Submitted: October 11, 2018
- Operation: Air carrier
- Aircraft: [N586AS](https://openairdocs.org/aircraft/N586AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35189
- Aircraft time: 41,937 hours, 12,806 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 26395
- Condition: Malfunctioned
- Location: Ac Bay
- Part time: 8,361 hours, 2,526 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018100926439

## Discrepancy

LEFT PACK LIGHT ILLUMINATED WITH MASTER CAUTION RECALL. EXTINGUISHED WHEN RESET IS PRESSED. GROUNDED - YES. LEFT HAND PACK TEMP CONTROL SYSTEM INOP. BITE CHECKED LT PACK CONTROLLER FOUND TCV FAULT. REMOVED AND REPLACED LT PACK TEMP CONTROL VALVE PER AMM 21-51-10. OPS AND LEAK CHECKS GOOD.

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