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Blown Dipstick

grassroots

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I blew the dipstick loose10 minutes into an acro flight yesterday. I heard a loud "pop" and noticed oil blowing from the cowling. Landed ueventfully. Lost about 1/2 quart.


Has this happened to anyone? I tightened the disptick as normal after checking oil during preflight. Seems the pop I heard would point to pressure build up, rather than it simply vibrating loose. I haven't yet checked the breather line or any other systems for restriction or clogging. Factory S-1S, AEIO-360, Christen Inverted Oil. Curious if there would be an obvious causeand prevention from this happening again.
 

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