What was found
PILOT REPORTED PARTIAL POWER LOSS, LATER ATTRIBUTED TO DEAD LEFT MAG. INVESTIGATION REVEALED OIL PASSING BY TURBO CHARGER INNER SEAL AND BEING BLOWN INTO MAG THROUGH THE PRESSURIZATION HOSE, COMTAMINATING THE LEFT MAG, BUT THE RIGHT WAS ON ITS WAY. UPON REMOVAL OF TURBO, THE TRANSITION TUBE BELOW THE TURBO WAS FOUND CRACKED AT THE SEPARATOR PLATE.