What was found
ACFT LANDED WITH NOSE LANDING GEAR IN THE UNLOCKED POSITION. THE PILOT REPORTED ON TAKEOFF THAT THE ACFT HAD A SEVERE VIBRATION AT APPROX 85 KNT, CONTINUED FLIGHT AND A SECOND ACFT VERIFIED THAT THE NLG WAS "FLOPPING AROUND", CONTINUED THE FLIGHT TO BURN OFF FUEL AND LANDED WITH CRASH RESPONSE AT THE AIRPORT. THE ACFT NOSE SETTLED UPON LANDING, THE ACFT REMAINED ON RUNWAY CENTER. DAMAGE WAS MINOR. THE NOSE LANDING GEAR DRAG LEG ASSY PN 002-820017-1 FAILED AT THE TOP END OF THE CASTING. THE METAL BROKE APART WITH INDICATIONS THAT IT HAD BEEN CRACKED FOR SOME TIME, THIS AREA CAN NOT BE INSPECTED WITH THE PART ON THE ACFT.