erich weaver
Well Known Member
Changed oil today and checked the pickup screen because I hadn't done it in quite awhile. UGH! Found two pieces of what appear to be a small broken cotter pin. Oil filter looked very clean upon cutting open and inspection. Engine has been running fine and didn't see anything unusual in last borescope inspection 6 months ago although I was mostly looking at valves. Last oil analysis was normal as well.
Couldn't think of how in the world that would get in there but it dawned on me on drive home - aren't the drive gears on p-mags secured with small cotter pins?
I also have a B n C 8 amp backup alternator on the accessory case. Can't remember if that uses a cotter pin or not.
I will pull pmags and have a look. Any other possible sources for this? What else should be done before next flight?
Thanks
Erich
Couldn't think of how in the world that would get in there but it dawned on me on drive home - aren't the drive gears on p-mags secured with small cotter pins?
I also have a B n C 8 amp backup alternator on the accessory case. Can't remember if that uses a cotter pin or not.
I will pull pmags and have a look. Any other possible sources for this? What else should be done before next flight?
Thanks
Erich
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