What was found
DURING TROUBLESHOOTING, METAL IN OIL SCREEN PROBLEM, A TANG WAS FOUND IN SUMP SUCTION SCREEN, BUT WAS UNABLE TO POSITIVELY IDENTIFY THE SOURCE OF METAL. TENTATIVELY IDENTIFIED AND HELICOPTER RETURNED TO SERVICE. 6.5 HOURS LATER, THE ENGINE QUIT SUDDENLY ON TAKEOFF. FORTUNATELY, NO DAMAGE TO HELICOPTER. ON INVESTIGATION OF PROBLEM, FOUND CRANKSHAFT GEAR AND PARTS IN ACCESSORY HOUSING. SUSPECT IMPROPER INSTALLATION AT LAST OVERHAUL.