tail rotor gear box

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tail rotor gear box

Postby richard » Sun May 13, 2007 2:11 am

have oil leak where vertical shaft enters gear box(shaft that changes pitch link to tail rotor) i undestand that it is an o ring. does any one have the size or description of this o ring .

thanks
richard
richard rotor head
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O ring

Postby ted.stokes » Tue May 15, 2007 1:41 am

Richard,

I assume you have a 12A/B/C with a T/R gearbox pn: 25000-1 or 3, 25034-1 or 3, 25035-4 or 5: if so it's an AN6227-17 per the parts manual.

Ted
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A&P IA
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Postby richard » Tue May 15, 2007 1:54 am

thanks ted i just ordered the part from spruce thanks to your info


thanks dick murphy
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Postby rotorhead » Tue May 15, 2007 1:59 am

Hi Richard,
If I understand you, you need the O-Ring for the shaft which passes up through the bottom of the gear box to control TR pitch. If so that would be an "AN6227-17" O-Ring. I don't have the MS number cross ref. handy, but I'm sure your local FBO parts counter or good O-Ring supplier could help you out with that if needed.

Good Luck!!
Geoff
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