What was found
AFTER TAKE OFF, THE LANDING GEAR WAS RETRACTED & THE PILOT HEARD A LOUD POP. PILOT DETERMINED THE NOSE GEAR WAS NOT ETRACTED. CONTINUED FLIGHT TO THE DESTINATION. AFTER LOWERING THE MLG, THE NLG WAS NOT EXTENDED. DURING LANDING, THE NOSE LOWERED AND CONTINUED TO LOWER UNTIL THE PROPELLER STRUCK THE PAVEMENT. INSPECTECTED THE NOSE GEAR AND FOUND THE DOORS JAMMED CLOSED, AFTER OPENING THE NOSE GEAR DOORS THE NOSE GEAR SWUNG FREE. EXAMINATION FOUND THAT THE ROD END CONNECTING THE RETRACT/EXTEND ROD HAD FAILED. THIS ALLOWED THE NOSE GEAR TO SWING FREELY. THE NOSE GEAR WAS NOT ABLE TO BE LOCKED IN THE DOWN POSITION.