# SDR 99ZZZX4324

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 5, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Filed by: [Textron Aviation Inc, repair station CNQR918C](https://openairdocs.org/faa-repair-station/CNQR918C/textron-aviation-inc.md) (OpenAirDocs)
- Aircraft: [N950QS](https://openairdocs.org/aircraft/N950QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500050
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: Pump
- Part number: D007966166
- Condition: Leaking
- Location: Hydraulic System
- Part time: 1,160 hours
- Stage of operation: NR
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX4324

## Discrepancy

HYDRAULIC VOLUME LOW 'A' SYSTEM IN-FLIGHT AT FL 410, SHUT DOWN 'A' HYDRAULIC SYSTEM.  FOUND 3 EACH SMALL PIN HOLES IN HYDRAUIC PUMP HOUSING.  REPLACED ENGINE DRIVEN HYDRAULIC PUMP.

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