Whats the line in the lower rh of the picThese are what mine looked like from LyCon.
Whats the line in the lower rh of the pic bowl area
Not sure, not a crack although it looks like one. Those were new Lycoming cylinders. They have several hundred hours on them now.Whats the line in the lower rh of the pic
Of it was in my shop it would be a hair from my dogs.Not sure, not a crack although it looks like one. Those were new Lycoming cylinders. They have several hundred hours on them now.
Looks like what's left of a fine point sharpie mark.Whats the line in the lower rh of the pic
Why would it be a major per the far’s if they don’t claim it’s increased power but a power balance for the pulses? Removing casting flash and minor cleanup that doesn’t affect strength or structural integrity could and is considered a minor change.Far as I know, any overhaul of a certificated engine must be done in accordance with the factory overhaul manual.
What I've always wondered is how these shops can do a "port and polish" job, which I'm pretty sure is not in the manual.
Is an STC required?
Typical FAA deal. One shop I know has the FAA's blessing and another shop can't do it on certified because of the FAA.Why would it be a major per the far’s if they don’t claim it’s increased power but a power balance for the pulses? Removing casting flash and minor cleanup that doesn’t affect strength or structural integrity could and is considered a minor change.
Quicker throttle response, a bit better fuel burn for a given condition, more power, cooler head temps and far more even numbers across all cylinders has been my experience on both my O-320 and IO-520Do you notice any difference after the Port and Polish?
Love the mud tracks under the wings!That is what I thought when I blew it up as well. Dog and/or cat hair is likely as well. I had supervision when I installed those.
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