What was found
AIRCRAFT WAS TAXIING WHEN THE LEFT GEAR FOLDED UP. THE AIRCRAFT WAS JACKED UP BY MAINTENANCE PERSONNEL AND THEY FOUND THE DOWNLOCK SPRING GUIDE ROD BROKEN IN TWO. THE SPRING GUIDE ATTACHES BETWEEN THE DOWNLOCK HOOK (PN 50-810338-1) AND THE MLG ACTUATOR (PN 99-810057-651). SEE BEECHCRAFT B-99 PARTS MANUAL, FIGURE 201, ITEMS 8, 31, AND 33 FOR BREAKDOWN. THIS ALLOWED THE OVERCENTER LOCK (PN 50-810338-1) TO WORK FREE AND THE GEAR TO FOLD. DAMAGE WAS TO THE LEFT ENGINE (PROP STRIKE) AND LEFT WING TIP. AIRCRAFT IS CURRENTLY AOG FOR REPAIRS. TSO CYCLES, 440.