What was found
(CAN) ENGINE HAD OIL PRESSURE FLUCTUATION ON RUN-UP. OIL FILTER FOUND TO HAVE EXCESSSIVE METAL CONTAMINATION. ENGINE WAS PULLED FOR REPAIR. UPON DISASSEMBLY THE NR 2 CAMSHAFT LOBE WAS FOUND EXTREMELY WORN AND THE NR 1 CAMSHAFT LOBE WAS FOUND DAMAGED AS WELL. THE NR 1 EXHAUST LIFTER BODY WAS BROKEN AND SEVERAL OTHERS WERE FOUND BADLY SPALLED. THE UNUSUAL THING ABOUT THE FAILURE WAS THAT THE AFT NR 1 PISTON PIN PLUG WAS FOUND WITTLED DOWN TO MANY SMALL PIECES AND HAD WORN THE PISTON PIN BOSS SEVERELY ALL THE WAY UP THROUGH THE BOTTOM 2 RING LANDS AND THROUGH THE LOWER PART OF THE PIN BOSS. I SUSPECT THIS WAS CAUSED BY THE METAL CONTAMINATION FROM THE CAMSHAFT FAILURE.