# SDR ASAA2023041542870

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2023
- Submitted: April 17, 2023
- Operation: Air carrier
- Aircraft: [N593AS](https://openairdocs.org/aircraft/N593AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35107
- Aircraft time: 55,040 hours, 16,417 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Modulating Valve
- Part number: 3989085
- Part serial: 9751
- Condition: Faulty
- Location: Right Ecs Bay
- Part time: 56,342 hours, 16,441 cycles
- Stage of operation: IN
- 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/ASAA2023041542870

## Discrepancy

WHILE TROUBLESHOOTING (ASA LP 60478264) FOUND RIGHT PACK TEMP CONTROL VALVE FAULTING. GROUNDED - YES. REPLACED RIGHT PACK TEMP CONTROL VALVE, BITE CHECK GOOD. REF B737-800 AMM 21-51-10.

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