# SDR UPS01535010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 2001
- Submitted: February 19, 2001
- Operation: Air carrier
- Aircraft: [N436UP](https://openairdocs.org/aircraft/N436UP), registered now
- Make and model: Boeing 757-24APF
- Registry model: [Boeing 757-24APF](https://openairdocs.org/model/boeing-757-24apf) (OpenAirDocs)
- Aircraft serial: 25467
- Engine: Rroyce RB211535E4
- System (JASC): [7260 · Turbine Engine Accessory Drive](https://openairdocs.org/jasc/7260)
- Part: Gearbox
- Condition: Failed
- Location: Lt Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS01535010

## Discrepancy

INSPECTION TYPE:N/A, ON TAKEOFF OUT OF 2000 FEET, THE LEFT ENGINE LOST OIL PRESSURE.  MAINTENANCE VERIFIED THAT HIGH SPEED GEARBOX DRIVE FOR OIL PUMP FAILED.  SUSPECT INTERNAL GEARBOX MALFUNCTION.  REMOVED AND REPLACED ENGINE.

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