# SDR UPS01534621

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 16, 2001
- Submitted: January 17, 2001
- Operation: Air carrier
- Aircraft: [N411UP](https://openairdocs.org/aircraft/N411UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 23851
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Panel
- Part number: 13056026
- Part serial: 99550
- Condition: Malfunctioned
- Location: Cabin
- 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/UPS01534621

## Discrepancy

INSPECTION TYPE:IN ATB UNABLE TO PRESS A/C.  FOUND CHECK PACK 9, OPS NORMAL.  BITE MHZ 21.5.  REMOVED AND REPLACED PRESS CONTROL OF MM 21-31-01 AND PERFORMED CHECK OF PRESSURIZATION ON MANUAL WORKING NORMAL.  PANEL REMOVED.

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