# SDR UPS07650507

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 2007
- Submitted: August 31, 2007
- Operation: Air carrier
- Aircraft: [N309UP](https://openairdocs.org/aircraft/N309UP), registered now
- Make and model: Boeing 767-34AF
- Registry model: [Boeing 767-34AF](https://openairdocs.org/model/boeing-767-34af) (OpenAirDocs)
- Aircraft serial: 27740
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Inoperative
- Location: Left
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS07650507

## Discrepancy

INSPECTION TYPE:ETOP RIGHT SYSTEM DUCT PSI LOW, IN FLIGHT AT FL 290 RIGHT DUCT PSI WAS 10 LEFT PACK OFF AIRCRAFT WAS NOT MAINTAINING CABIN ALTITUDE.  RECONNECTED HPC ELECTRICAL CONNECTOR. REF MM 36-11-00-5. REPLACED PRSOV PER MM 36-11-09-2. OPS CHECKED SYSTEM, CHECKS OK OPS CHECKED VALVE, CHECKS OK.

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