What was found
PILOT REPORTED HEARING LOUD POP. LT MLG WAS HANGING OUT OF WHEEL WELL. PUTTING GEAR SELECTOR IN DOWN POSITION, RT MAIN AND NLG EXTEND FULLY. LT WAS STILL HANGING LOOSE. ATTEMPT TO PUMP DOWN LT WITH EMERGENCY PUMP WAS UNSUCCESSFUL. A/C WAS PUT INTO HANGAR AND GEAR INSPECTED. INSP REVEALED LT MAIN GEAR ACT HAD CRACKED THROUGH FWD MOUNTING BOLT HOLE. CRACK CAUSED PINION GEAR TO SEPERATE FROM RACK GEAR. THESE SEEM TO BE CRACKING AFTER COMPLING WITH AD AND MFG SB. ACT, S/N 5349 WAS FOUND CRACKED IN SAME LOCATION. ACT S/N 5384 WAS FOUND CRACKED IN SAME LOCATION. SEEMS NEW BUSHINGS THAT ARE INSTALLED AS PART OF SB MAY BE CAUSING SOME ADDED STRESS TO ACTUATORS.