# SDR ASAA2022080839464

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 8, 2022
- Submitted: August 12, 2022
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 22,323 hours, 7,001 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: UNKNOWN
- Condition: Dirty
- Location: Unknown
- 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/ASAA2022080839464

## Discrepancy

RH PACK LIGHT ILLUMINATED ON MASTER CAUTION RECALL. RESET WITH MC RESET. GROUNDED - YES. ACCOMPLISHED BITE ON BOTH TEMP CONTROLLERS REF B737-900 FIM 21-61 TASK 801.FOUND #2 CONTROLLER TEMP CTRL VALVE FAULT 21-51267 PACK TCV & TEMP CNTRL VALVE 21-51264 TCV STAYING CLOSED). REMOVED R/H PACK TEMP CNTRL VALVE CANNON PLUG & CLEANED, REINSTALLED. CLEARED FAULTS & RETESTED, OPS CHECKS NORMAL.

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