# SDR ASAA2022050538214

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 5, 2022
- Submitted: May 9, 2022
- Operation: Air carrier
- Aircraft: [N494AS](https://openairdocs.org/aircraft/N494AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41729
- Aircraft time: 22,853 hours, 7,043 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989083
- Part serial: 2174
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 82,287 hours, 42,765 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/ASAA2022050538214

## Discrepancy

RIGHT PACK LIGHT ON RECALL CLEARS W/ MASTER CAUTION RESET. GROUNDED - YES. FOUND RIGHT PACK TCV CONTINOUSLY RUNNING A/C MOTOR VERY HOT WITH NO BLEED LOAD APPLIED. REMOVED AND REPLACED RIGHT PACK TCV REF B737-900 AMM 21-51-10. OPS AND LEAK CHECK GOOD.

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