# SDR RYNA200500029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2005
- Submitted: September 20, 2005
- Operation: Air carrier
- Aircraft: [N753NA](https://openairdocs.org/aircraft/N753NA), registered now
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft serial: 24544
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Line
- Part number: 271N61191
- Condition: Leaking
- Location: Hydraulic Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/RYNA200500029

## Discrepancy

EICAS MESSAGE LEFT HYDRAULIC QUANTITY AND PRESSURE LOST.  QUANTITY LEVEL 0.10 LT.  REMOVED AND REPLACED RIGHT DOWNLOCK ACTUATOR RETURN LINE.  LEAK CHECK GOOD, ALSO FOUND NR 1 ENGINE DRIVEN HYDRAULIC PUMP LEAKING.  REMOVED AND REPLACED ENGINE DRIVE PUMP AND PRESSURE DRAIN FILTER.  SYSTEM LEAKED AND OPERATIONALLY CHECKED GOOD.

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