# SDR ASAA2018091826136

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2018
- Submitted: September 18, 2018
- Operation: Air carrier
- Aircraft: [N493AS](https://openairdocs.org/aircraft/N493AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41727
- Aircraft time: 9,549 hours, 3,232 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 25814
- Condition: Failed
- Location: Ac Bay
- Part time: 9,562 hours, 3,235 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/ASAA2018091826136

## Discrepancy

RIGHT PACK LIGHT ILLUMINATES ON RECALL AND RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. REPLACED RT PACK PRIMARY TEMP CONTROL VALVE PER AMM 21-61-21-400-801.

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