What was found
LT WING L/E ASSY INBD RIB (1A) IS CHAFING AGAINST THE FWD WING/FUSELAGE FAIRING SUPPORT STRIP. THE SUPPORT STRIP IS FLUSH RIVETED TO THE OTBD WEB OF THE WING/FUSELAGE FAIRING AND SANDWICHES A SEAL. THE SUPPORT STRIP AND SEAL WERE INSTALLED OVER THE TOP OF MS20470AD UNIVERSAL HEAD RIVETS CREATING A BULGE IN THE SUPPORT STRIP WHICH IS CAUSING THE SUPPORT STRIP TO CONTACT THE L/E RIB. REPLACEMENT OF THE ABOVE MENTIONED MS20470AD RIVETS WITH FLUSH RIVETS WOULD ALLEVIATE THIS PROBLEM.