# SDR UPS07550454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2007
- Submitted: August 20, 2007
- Operation: Air carrier
- Aircraft: [N402UP](https://openairdocs.org/aircraft/N402UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23724
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS07550454

## Discrepancy

INSPECTION TYPE:N/A CRUISING AT FL370 WITH LEFT PACK OFF AND RIGHT PACK ON, PRESSURIZATION AUTO CONTROLLER WAS IN AUTO 2 WITH DESTINATION SET AT 10 FT.  ON INITIAL DESCENT PASSING THROUGH FL330, THE CABIN ATLITUDE EICAS WARNING LIGHTS CAME ON AND INDICATED 10,000 FT.  REMOVED AND REPLACED # W AUTO PRESS CONTROLLER AS PRECAUTION, BITE CHECKS GOOD.  CLOSED ON M356854.

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