# SDR 2013F00124

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2013
- Submitted: June 3, 2013
- Operation: Air carrier
- Aircraft: N773AS
- Make and model: Boeing 737-4Q8
- Registry model: [Boeing 737-4Q8](https://openairdocs.org/model/boeing-737-4q8) (OpenAirDocs)
- Aircraft serial: 25106
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Faulty
- Location: Ac Bay
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2013F00124

## Discrepancy

DEPARTED AFTER PUTTING LT PACK ON DMI, AFTER T/O RT PACK KEPT TRIPPING OFF, ACFT HALFWAY TO DESTINATION DECIDED TO DIVERT, NO EMERGENCY DECLARED.  AFTER T/S SYS FOUND THAT WHEN RT PACK WENT INTO HIGH THE PACK WOULD FALL OFF LINE INTERMITTENTLY, PERFORMED A PACK CONTROLLER INTEROGATION AND FOUND THAT THE TEMP CONTROL VALVE WAS AT FAULT.  THE LT PACK HAD A CONTROLLER THAT WAS FAULTING ALSO.

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