# SDR ASAA2017121022816

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2017
- Submitted: December 11, 2017
- Operation: Air carrier
- Aircraft: [N440AS](https://openairdocs.org/aircraft/N440AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41705
- Aircraft time: 16,435 hours, 5,454 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 3989083
- Part serial: 1707C
- Condition: Failed
- Location: Right Ecs Bay
- Part time: 68,365 hours, 39,805 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017121022816

## Discrepancy

RIGHT PACK OVERHEAT LITE ON RECALL, EXTINGUISHES WHEN RESET. GROUNDED - YES. REMOVED AND REPLACED RIGHT PACK TEMP CONTROL VALVE PER B737-900 AMM 21-51-10. OPS CK GOOD. THIS REMOVES MEL 21-32B.

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