What was found
(CAN) THE CRANKSHAFT OF THIS AIRCRAFT WAS INSPECTED DUE TO A FAILURE OF A CRANKSHAFT OF ANOTHER AIRCRAFT IN THE FLEET (INTERNAL CORROSION). UPON REMOVAL OF THE FRONT CRANK PLUG AND CLEANING OF THE CRANKSHAFT. IT WAS DISCOVERED THAT THE URETHABOND COATING WAS PEELING AND IT SUBSEQUENTLY PEELED COMPLETELY AWAY FROM THE CRANK. FURTHER INSPECTION FOUND CORROSION ON THE FIRST INCH OF THE CRANKSHAFT. THIS CRANKSHAFT HAD NOT BEEN RE-WORKED IN THE PAST SO THERE WAS ENOUGH MATERIAL TO CLEAN THE CRANK AND RETURN IT TO SERVICE. ENGINE WAS OVERHAULED ON 3 MAR 99 AND WAS MARKED PID NOT REQUIRING ANY INTERNAL INSPECTIONS UNTIL 2000-HRS. (TC NR20051205007)