# SDR ASAA2019011427795

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 2019
- Submitted: January 16, 2019
- Operation: Air carrier
- Aircraft: [N590AS](https://openairdocs.org/aircraft/N590AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35687
- Aircraft time: 41,906 hours, 12,654 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989085
- Part serial: 20993
- Condition: Failed
- Location: Ac Bay
- Part time: 16,142 hours, 5,136 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/ASAA2019011427795

## Discrepancy

AFTER START, RIGHT HAND PACK LIGHT ILLUMINATED ON RECALL. LIGHT EXTINGUISHED ON RESET. GROUNDED - YES. REPLACED RIGHT PACK TCV (V141) INSTALLATION TEST PASSES, NO LEAKS NOTED. REF AMM 21-51-10-400-801. GROUND VERIFICATION SUCCESSFUL.

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