Originally Posted By Cab_Burge
I think the FAA will accept up to 60% leakage and still let you operate the airplane with the proper sign offs shock
The procedure is different also on aircraft leak down test, you don't test it at TDC, you pull the piston up being tested with the prop to about 120 to 90 degrees BTDC on the compression stroke and have someone read the gauge while holding the prop at that spot work
Sometines I will pull a piston up on one of my motors until the valves close to see what the bottom ring sealing looks like thumbs
continental requirements are based on the service bulletin and requires the minimum be based on an office size for cylinders under 5" bore and a bigger one for over 5" which means an engine can run with 42 psi /80 and meet spec. I also do comp at tdc per ac43.13. Tim

Last edited by astjp2; 10/16/16 12:09 AM.
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
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