What was found
(CAN) STARTER GEN FAILED IN FLT. PILOT OBSERVED A GENERATOR FAIL LIGHT ON, & LANDED SAFELY. UNIT REMOVED & SENT TO AMO FOR INSPECTION. FOUND THE DRIVE END BEARING LINER LOOSE IN ITS CAST ENDBELL. LOOSENESS PERMITTED ARMATURE TO CONTACT STATOR, CAUSING METAL TO HEAT FROM FRICTION & COME APART, SEIZING THE GENERATOR & SHEARING THE QUILL SECTION OF THE DRIVE SHAFT. DRIVE END BEARING LINER IS A STEEL PART CAST INTO THE ENDBELL. IT CAME LOOSE & BEGAN TO TURN WITH THE BEARING & ARMATURE. THE OUTER SURFACE OF THE STEEL LINER, WHICH IS KNURLED BEFORE BEING CAST INTO THE ALUMINUM END BELL, CHEWED THE ENDBELL UNTIL CLEARANCE BETWEEN THE ARMATURE & THE STATOR POLES WAS ZERO.