What was found
A NEW STARTER WAS INSTALLED AND AFTER JUST A FEW FLIGHTS THE STARTER FAILED TO OPERATE. AFTER REMOVAL OF THE STARTER, FOUND THE REAR HSG OF THE STARTER (WHICH CONTAINS THE MOTOR) HAD TWISTED IN RELATION TO THE FRONT HALF OF THE STARTER. THIS TWISTING ALSO CAUSED THE POWER WIRE TO BREAK AND SHORTED AGAINST THE HOUSING CAUSING BURN MARKS. INSTALLED A NEW STARTER OF THE SAME TYPE AND PN AND IT FAILED AFTER THE NEXT FLIGHT, 1.5 HOURS, STRANDING THE PILOT AT A DIFFERENT AIRPORT. AFTER TALKING TO THE MECHANIC WHO CHANGED THE SECOND STARTER (SN FN-160992), DISCOVERED THE SAME PROBLEM HAD OCCURRED AND THAT THE REAR HSG TWISTED UPON FAILURE.