# SDR UPS01536408

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2001
- Submitted: August 1, 2001
- Operation: Air carrier
- Aircraft: [N475UP](https://openairdocs.org/aircraft/N475UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 28845
- System (JASC): [5230 · Cargo/Baggage Doors](https://openairdocs.org/jasc/5230)
- Part: Priority Valve
- Condition: Defective
- Location: Cargo Door
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS01536408

## Discrepancy

INSPECTION TYPE:N/A ATB FOR LOUD NOISE AND MCD DOOR EICAS WARNING IND DURING T/O LIGHT ILLUMINATED AT MAIN STRUT EXTENSION ON T/O ACCOMPANIED FROM A THUMP FROM THE CARGO AREA. DECLARED EMERGENCY AND RETURNED. ON DOWN WIND THE LIGHT EXTINGUISHED. TROUBLE SHOT MAIN CARGO DOOR TO A DEFECTIVE PRIORITY VALVE (PV2) AS PER B757 MM 52-32-00. PERFORMED OPS CHECK AND LEAK CHECK OF MCD SYSTEM AS PER MM 52-32-00 SYSTEMS CHECK OK.

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