# SDR CA120815002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Gulstm 690
- Engine: Garrtt TPE3315251K
- Propeller: Hartzl HCB3TN5
- System (JASC): [3233 · Landing Gear Actuator](https://openairdocs.org/jasc/3233)
- Part: O-Ring
- Condition: Failed
- Location: Mlg Actuator
- Stage of operation: NR
- How discovered: 9
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA120815002

## Discrepancy

(CAN) AN INTERNAL O-RING FAILURE WAS THE CAUSE OF AN ACTUATOR LEAK AND SUBSTANTIAL AIRFRAME SYS HYDRAULIC FLUID LOSS DURING FLIGHT.  UPON INVESTIGATION BY MAINTENANCE CREW IT WAS DISCOVERED THAT AN INTERNAL O-RING IN THE HYDRAULIC RETRACTION ACTUATOR HAD ROLLED OUT OF POSITION WITH FRICTION FROM THE INTERNAL PART OF ITS CHROME STRUT AND EVENTUALLY FAILED.

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