I wanted to update you all on my latest interesting annual on N12AY.
I had a top overhaul done on my old 914 due to my over speed. Kerry Yunk at
Lockwood
did a great job replacing my intake valves and cleaning up the seats, cylinders
and such. I also had the gearbox done as it was nearing 500 hours.
Initial pre annual test flight after the rebuild had some pesky oil leaks,
overheating
and the typical maladies of a 914 that has sat for months due to other
priorities.
I finished my annual but after many engine runs the coolant leaks were just a
loose
hose clamp or two venting pressure. The oil drips were common from the plenum,
and the only surprises were my magnetic plug (new style) threads are a bit
loose and to seal it properly, I used some Loctite 515 to seal the threads.
I failed to properly seat my oil screen in the tank after cleaning which spit
some oil off the can.
The turbo seemed to be leaking oil. I worried about all the areas that could be
wrong or failing. I looked, ran the engine, and fussed over the engine. The
clamp on the 2 inch turbo to plenum line was poorly fitted after maintenance
and I missed it. The old adage it is always the last thing you checked was
proved
right again.
Thankfully all seems dry again.
Attached is a paper I did on N12AY putting on some drip cans I will keep with my
aircraft documentation. I copied Ron Paragoris's oil separator idea but on
a smaller scale to test. So far so good, and I'm a happy non greasy maintainer.
Now it's time to be a happy flier of a clean aircraft.
Best Regards,
Bud Yerly
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=506391#506391
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