# SDR ASAA2018100826389

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2018
- Submitted: October 9, 2018
- Operation: Air carrier
- Aircraft: [N530AS](https://openairdocs.org/aircraft/N530AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 36578
- Aircraft time: 33,287 hours, 9,882 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 10948
- Condition: Failed
- Location: Ac Bay
- Part time: 36,924 hours, 11,192 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/ASAA2018100826389

## Discrepancy

LEFT "PACK" LIGHT ILLUMINATED ON RECALL AFTER START. GROUNDED - YES. NR 1 PACK TEMP CONTROLLER FFR SHOWS TCV THIS PACK. FAULT HAS HISTORY. REMOVED AND REPLACED LEFT HAND TEMP CONTROL VALVE ASSY IAW AMM 21-51-10. SYSTEM OPS CHECK GOOD. GROUND VERIFICATION GOOD. LEAK CHECK COMPLIED WITH.

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