What was found
LEFT CENTER WING, JUST FWD OF SPAR CAP, AND JUST INBD OF NACELLE. THE SKIN HAS MULTIPLE PULLED THROUGH RIVETS THAT ATTACH THE SKIN TO THE SPAR, MOSTLY ON OTBD AFT AREA, INSTALLED NEW RIVETS. HAVE HAD THIS PROBLEM ON MULTIPLE MILITARY SERIES ACFT. IN THE LAST 4 YRS IN THE SAME AREA. 1 ACFT ABOUT 6 MONTHS AGO, HAD TO REPLACE 6 RIVETS.