# SDR UPS04542614

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2004
- Submitted: June 28, 2004
- Operation: Air carrier
- Aircraft: [N460UP](https://openairdocs.org/aircraft/N460UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25481
- System (JASC): [2780 · Leading Edge Slat Control System](https://openairdocs.org/jasc/2780)
- Part: Bypass Valve
- Condition: Failed
- Location: Slats
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04542614

## Discrepancy

AFTER SELECTING FLAPS 1, FLAP POSITION INDICATOR STOPPED BETWEEN 0 AND 1, LEADING EDGE SLAT DISAGREE MSG APPEARED.  COMPLETED APPROPRIATE CHECKLIST AND LANDED FLAPS 20 W/O FURTHER PROBLEM.  REMOVED AND REPLACED L/E SLAT BY-PASS VALVE, OPS CHECKS GOOD PER MM 27-81-09-4.  LEAK CHECK GOOD FSEU-3 MSG, SLAT PDU XTR, FAULT.  REMOVED AND REPLACED PDU XTR (SLATS) CHECKS GOOD PER MM 27-81-08-2.

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