What was found
ON LANDING, NOSE GEAR COLLAPSED. SECTION OF LOWER DRAG BRACE FOUND ON RUNWAY. SECTION HAD BROKEN OFF AT OVERCENTER PIN. UPLOCK P/N FAILED, BOTH ENDS DEPARTED AIRCRAFT AND WERE NOT FOUND. SECTION OF UPLOCK PIN REMAINED IN NOSE GEAR UPPER STRUT HOUSING. BEECH SB 2036 HAD NOT BEEN ACCOMPLISHED.