# SDR UPS07548878

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2007
- Submitted: January 19, 2007
- Operation: Air carrier
- Aircraft: [N404UP](https://openairdocs.org/aircraft/N404UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23726
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Malfunctioned
- Location: Right
- 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/UPS07548878

## Discrepancy

CABIN ALT LIGHT AND EICAS MESSAGE APPEARED.  CABIN ALT CONFIRMED AT 10000' CABIN RATE WAS CLIMBING.  OUTFLOW VALVE WAS CLOSED.  SWITCHED TO AUTO 2-NO EFFECT.  MANUAL INITIALLY DID NOT CLOSE OUTFLOW VALVE.  T/S BOTH NR 1 AND NR 2 CABIN PRESSURE CONTROLLERS PER FIM 21-30-00.  NO FAULTS NOTED.  PRESSURIZED A/C WITH RT PACK ONLY PER MM 05-51-24-2.  COULD ONLY GET 1.5 PSID.  PRESSURIZED WITH LT PACK OK.  DEFERRED RT PACK PER MEL 21-51-1.  NO DMP.  INSTALLED PLACARD.  ASSIGNED DEFERRAL M-342219.

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