What was found
TIRE DEBRIS & MLG DOOR ON RUNWAY, NO ABNORMAL FLT CHARACT/INDICATIONS. LOWERED MLG & FLEW BY TOWER, EMER LANDING DECLARED. LANDED W/O INCID. MAINT FOUND NR 4 TIRE SHREDDED, RT MLG INNER DOOR MISSING. DAMAGED RT MLG CENTER DOOR, RT INBD T/E FORE FLAP AT MID SPAN, RT WING T/E INBD PANEL AFT OF RT MLG WW, NR 4 GROUND SPOILER ATTACH LUG. REPLACED RT MLG CENTER & INNER DOOR, RT INBD T/E FORE FLAP, RT WING T/E INBOARD PANEL, NR 4 GROUND SPOILER, ATTACH LUG, BOTH NR 3 & 4 MLG TIRES. NR 4 TIRE SENT TO MANUFACT FOR ANALYSIS. ANALYSIS OF TIRE FOUND 33 PERCENT OF TREAD WORN, NO SIGNS OF LONG TERM OVER DEFLECTION, CORD SEP, OR CORD FATIGUE. X-TYPE RUPTURE FOUND ON TREAD INDICATING CONTACT WITH A FOD, & REASON TIRE BURST.