# SDR CA040728010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2004
- Submitted: January 5, 2005
- Operation: General aviation
- Make and model: Cndair CL2151A10
- Aircraft time: 3,545 hours
- Propeller: Hamstd 43E60
- System (JASC): [2913 · Hydraulic Pump (Electric/Engine), Main](https://openairdocs.org/jasc/2913)
- Part: O-Ring
- Part number: MS2877810
- Condition: Blown
- Location: Hyd Pump
- Stage of operation: AP
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA040728010

## Discrepancy

THE AIRCRAFT WAS ON APPROACH TO THE AIRPORT.  THERE WAS A LOSS OF HYDRAULIC PRESSURE.  THE AIRCRAFT LANDED WITHOUT INCIDENT.  UPON INVESTIGATION BY MAINTENANCE STAFF THE RT ENGINE DRIVEN HYDRAULIC PUMP O-RING AT THE PRESSURE LINE FITTING HAD BLOWN ALLOWING THE HYDRAULIC FLUID TO LEAK OUT UNDER PRESSURE.  THE FAILED O-RING WAS REPLACED WITH A SERVICEABLE O-RING AND THE HYDRAULIC SYSTEM WAS REPLENISHED.  THE RT HYDRAULIC PUMP CHECKED SERVICEABLE.  THE LT PUMP WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

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