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Front main bearing failure in Lycoming or Continental aircraft engine

A bearing where the Babbitt has been wiped (displaced) is caused by a rupture of the oil film. This can be caused by: Too little clearance or by loss of oil to the bearing or Cold weather starts on thick oil can cause wiping of the front main bearing.

Pull the Rip Cord Your airspeed determines to a great extent, how long you must wait before you pull your rip cord. Parachute Sense US Navy 1944

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