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Following a propeller strike with damage to the propeller it is imperative that checks are carried out to ensure that engine internal component damage has not occurred. If the engine is run after a propeller strike without these checks having been carried out, further catastrophic damage can destroy the engine, sometimes several hours later.


The following checks are made during a shock load check:



When a slipper clutch is fitted to the engine the crankshaft and flywheel are protected. However, damage may still occur within the gearbox and the first 5 checks in the list are necessary.