What was found
AIRCRAFT HAD SUFFERED A SERIES OF HUNG STARTS, ENGINE WOULD HANG UP AT 30%. IF THE ENGINE WOULD START, IT WOULD BE A SLOW START. USUALLY, THE PILOT WOULD REACH THE STARTER TIME LIMIT OF 45 SEC'S BEFORE THE ENGINE WOULD START AND BE SELF-SUSTAINING,AND HE WOULD HAVE TO ABORT THE START SEQUENCE. TROUBLE SHOOTING FOUND THE INJECTORS WERE "DRIBBLEING" FUEL INSTEAD OF A SMOOTH,EVEN,FAN PATTERN. CHANGED THE OVERSPEED AND DRAIN VALVE. AFTER HAVING THE SAME RESULTS: SLOW/HUNG STARTS, CALLED A TURBOMECCA TECH REP.HE SUGGESTED THAT WE CHECK THE T4 HARNESS.HARNESS WAS OHMED OUT, ONE PROBE SHOWED AN OPEN PROBE. REPLACED T4 HARNESS, GROUND RUN AIRCRAFT HAD 3 SUCCESSFUL STARTS. OPS CHECK WAS NORMAL. THE SLOW START HUNG START