# SDR 97ZZZX5092

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N652MK](https://openairdocs.org/aircraft/N652MK), registered now
- Make and model: Rkwell NA26565
- Aircraft serial: 46536
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Motor Assy
- Part number: 165FE00503
- Condition: Failed
- Location: Hydraulic Pump
- Part time: 22 hours
- Component: Vickers, 939789
- Stage of operation: CR
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX5092

## Discrepancy

STRONG VIBRATION FELT IN AFT SECTION OF AIRCRAFT DURING FLIGHT.  HYDRAULIC SYSTEM PRESSURE COULD NOT BE MAINTAINED USING NR 1 HYDRAULIC PUMP.  NR 1 HYDRAULIC PUMP HAD FAILED.  FOUND METAL CONTAMINATION IN BOTH PRESSURE AND RETURN FILTERS, PUMP HAD BEEN MODIFIED AT TIME OF INSTALLATION BY C/W VICKERS SL -29-940070-1.  HYDRAULIC PUMP SENT TO MANUFACTURER FOR TEAR-DOWN.  AWAITING RESULTS AT THIS TIME.

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