What was found
SUPPLEMENTAL, DURING A-CHECK INSPECTION THE LT AFT FUSELAGE SKIN WAS FOUND TO HAVE 5 SEPARATE CRACKS AT 3 DIFFERENT RIVETS AT FRAME 75. THESE INCLUDE 2 CRACKS MEASURING .07" AND .25" ON EITHER SIDE OF 1 RIVET DIRECTLY ABOVE STRINGER 2 LT, 2 CRACKS MEASURING .15" AFT AND .11" 45 DEGREE ANGLE AFT OF RIVET DIRECTLY BELOW STRINGER 2 LT, AND 1 CRACK MEASURING .11" EXTENDING AFT OF THE SECOND RIVET BELOW STRINGER 2 LT AT AN APPROXIMATE 60 DEGREE ANGLE. MX REMOVED THE DAMAGED SECTION OF SKIN AND PERFORMED A DOUBLER REPAIR, AND THAT ACFT WAS APPROVED FOR RETURN TO SERVICE.