# SDR ASAA2022081339545

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2022
- Submitted: August 19, 2022
- Operation: Air carrier
- Aircraft: [N493AS](https://openairdocs.org/aircraft/N493AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41727
- Aircraft time: 23,062 hours, 7,243 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989085
- Part serial: 7019
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 54,157 hours, 20,782 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022081339545

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL. EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. REPLACED RH PACK TEMPERATURE CONTROL VALVE REF B737-900 AMM 21-51-10.

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