IO 360 A1A

[Newguy]

Hi group

Whats the general cost for tear down after prop strike assuming no damage?   10K?

Gary

[Newguy]

Quote: pmccand

Thanks Phil

So Under 5K.  Was it an approved FAA Mooney shop or a by a AME (canada we call them Aircraft Maintenance engineer)?   

Define the ported cylinders for me?

Gary

[planebones]

Before you let anyone tell you you need a complete teardown and etc. (as would be the case with a TCM brand engine)  study Avco Lycoming Service bulletin 533A and 475C and AD 2004-10-14.  My interpretation is that if the shaft is not bent, you remove the engine, rear acc. case, change a bolt and lock tab, check out gears etc.  and return to service.    Ken A&P/ IA  .  If you see it different let me know.

[Newguy]

Ken

Thats correct,533A and 475C and AD 2004-10-14 but this is my question to you.  

How do you know if the shaft was or was not bent unless you tear it down?

Gary

 

[LT4BIRD]

You do a run out of the flange with a dial indicater. 

 

[Steve65E-NC]

How about a detailed discription, or reference, for the dial indicator run-out check, including limits (IO360-A1A).  I am assembling a file from this string.  No need for it now but would like to have it available since it can happen to any of us, any time. 

[planebones]

The engine overhaul manual tells "runout limits" for the engine....normally performed on a set of blocks on a bench.....you are doing it in the engine....not as easy....but doable.     Personally, if a guy realized he was landing gear up and shoved the throttle to the wall trying to go around and in the process pretzeled the prop under power.....i think the engine should be torn apart, rightdown to magneto rebuild etc.   A power off prop strike that eats the tips off all three (or two) bl .... that bades evenly, although nothing to sneeze about, is not the tramatic event as the former.    Ken    

[Newguy]

Would you climb in that bird with a field fix as 533A, 475C and AD 2004 -10-14 and fly across the rocks on a 4 hour leg?

Gary  

[Newguy]

Quote: LT4BIRD

You do a run out of the flange with a dial indicater. 

 

[acronut]

You leave the prop on and it takes about 5 minutes to "dial" a crank.  A dial indicator will have a magnetic base or some other way to secure it to the engine.  Then there is an adjustable arm that you position so the dial rests on the side of the crank flange.  You turn the prop by hand.  As it turns the indicator will stay stationary and indicate any deviations on the dial.  Hard to visualize without a pic sorry.

[acronut]

Quote: Newguy

????and this means you take the prop off, and the couple of inches of crankshaft out the front end of the engine will have a slight bend?  There is tolerance level that is within limits and outside of those limits you tear it down and replace?

Gary

[Alan Fox]

Take the prop off ( you have to anyway to replace it) Dial out the flange , The runout spec is huge most strikes do not bend the crank beyond specs ) Than you remove the mags , Vacuum pump and filter block...  Remove the accy case , check the accy gears with dye penetrant , Replace the bolt and lock plate on the drive gear , replace the accy case gasket and the front third of the oil pan gasket , and reassemble ..  All this can be done with the engine installed ... Total parts are about 120 $ ..Labor is about 12 hours ...  This the procedure as spelled out in the lycoming service bulletin... Thats it!!