What was found
INSPECTION TYPE:D, MAIN DECK LT BS 2231 INNER CHORD AREA S17, 1 EA HOLE FOUND CRACK AT FRAME STRAP & AFT INNER CHORD. REPAIRED IAW HX RS R-53-60-37322 REV A & EO B747-5310-46200-A JUST BTW STR-15 AND STR-18 STRAP CRK RUNNING AFT 0.050" & CHORD CRACK RUNNING FWD 0.020" & RUNNING AFT 0.050", STRAP ORIG MATL:7075T6-0050" & CHORD ORIG MATL:BAC1503-100387-7075T6, FINAL CUTOUT SIZE:1"X1"X0.5" RADIUS, THIS REPAIR IS TIME LIMITED UNTIL 18121, TOTAL FLIGHT CYCLES.