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Help! As mentioned in another thread, I've been facing prop overspeed beyond 2700 rpm red line - on the ground all seems fine but when airborn and oil gets warm the prop overspeeds (noticed 2 times during initial climb). I had governor overhauled but it did not solve the problem. So I did the test described in Lycoming SI 1462A and...it failed (I did it with engine at ambient temperature but I dont think it impacted the results anyhow). So, I got the prop dismantled and inspected plugs at the crankshaft end - seems like they both sit tight. Next, I machined tight plastic cap with gasket, bolted it to the prop flange and made Lycoming pressure test again - still no pressure buildup and distinc oil gurgling heard inside the engine case. Then, I disconnected hose delivering oil from the governor to front of the engine case, pluged the fitting in the engine case and supplied air pressure through the plastic cap bolted in place of the governor - also no pressure buildup and oil gurgling inside the engine :-( Any ideas what else I could check to find cause of the issue other than worn front bearing requiring splitting the engine?! Any suggestions more than wellcome! thanks in advance, Marek
