# SDR 96ZZZX375

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N6701V](https://openairdocs.org/aircraft/N6701V), registered now
- Make and model: Beech 76
- Registry model: [Beech 76](https://openairdocs.org/model/beech-76) (OpenAirDocs)
- Aircraft serial: ME297
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: O-Ring
- Part number: AN6227B10
- Condition: Failed
- Location: Lt Mlg Cylinder
- Stage of operation: IN
- Nature of condition: K, W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX375

## Discrepancy

UPON DISASSEMBLY OF THE LEFT LANDING GEAR RETRACT/EXTENSION CYLINDER, THE MAIN END CAP O-RING (AN 6227 B-10) WAS FOUND TO HAVE FAILED.  THIS O-RING CONTAINS THE FLUID AND KEEPS IT FROM ESCAPING TO AN EXTERNAL LEAK ON THE LANDING GEAR DOWN SIDE.  UPON CLOSE EXAMINATION OF THE FAILED O-RING, DETERMINED THE FAILIURE WAS CAUSED BY THE O-RING BEING INSTALLED WITH A TWIST, WHICH IS STILL EVIDENT IN THE OLD O-RING.  THIS TWIST CAUSED A PRE-LOAD IN THE CROSS SECTION WHICH EVENTUALLY CAUSED THE FAILURE AND SUBSEQUENT FLUID LOSS.

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