What was found
(CAN) A LARGE AMOUNT OF ALUMINUM WAS FOUND IN THE OIL SCREEN. A CYLINDER DIFFERENTIAL COMPRESSION CHECK WAS PERFORMED AND FOUND TO BE ALL ABOVE 70/80. STARTER DRIVE WAS REMOVED AND INSPECTED, NO DAMAGE FOUND AT THIS TIME (SUSPECTED USING ONLY A BORESCOPE). CYLINDERS 3 AND 1 WERE REMOVED FOR INTERNAL ENGINE INSPECTION. NR 1 CYLINDER INTAKE HYDRAULIC LIFTER WAS FOUND TO HAVE A .25 INCH BY .25 INCH BY .0625 INCH (APPROX) CHIP OUT OF THE FOLLOWING FACE. AT THIS POINT THE ENGINE WAS REMOVED FOR REPAIR AT AIRCRAFT TECHNICAL CONSULTANTS. 7 A,, B AND C FOUND DURING A 50 HR OIL CHANGE. (X)