What was found
DURING OP 16 MAINT CHECK, FOUND LT MLG WHEEL WELL LT TRAP PANEL AREA, A CRACK HAD MIGRATED BEYOND STOP DRILL AND WAS IN MOUNT BOLT HOLE. CONFIRMED BY HIGH FREQ EDDY CURRENT. REMOVED 718 CASTING AND INSTALLED NEW LT 718 PER SERVICE BULLETIN 53-131 AND SPM 6-70-1.