What was found
DURING LANDING, RIGHT INBOARD MAIN DEPARTED AIRCRAFT, OUTBOARD TIRE THEN FAILED. INVESTIGATION REVEALED ONE EACH STUD ON HUB MISSING ONE EACH. STUD BROKEN PREVIOUSLY. REMAINING 6 STUDS ALL FRACTURED PRIOR TO FAILING. THERE WAS NO EVIDENCE OF EXCESSIVE BRAKING (NO SCUFF/FLAT ON TIRE). AGE OF STUDS, POSSIBLE OVER-TORQUING OF BOLTS ARE FACTORS. ACFT ALSO OPERATED IN AUSTRALIA, HAS HIGH FLOTATION GEAR FOR UN-IMPROVED STRIPS - MAY BE FACTOR. HUB DOES NOT HAVE TO COME OFF DURING TIRE CHANGE. RECOMMEND VISUALLY AND NDI INSPECTION ON TIME OR CYCLE.