NG INBOARD FIXED TRAILING EDGE UPPER PANEL BULB SEAL CHAFING ON WING-TO-BODY FAIRING PANEL - INSPECTION. REPAIR AND MODIFICATION.. SERVICE BULLETIN WINGS - CENTER WING - REAR SPAR VAPOR BARRIER - INSPECTION. REPAIR AND MODIFICATION. SERVICE BULLETIN MOS 28-SEP-2009 3378:04 AFL 5500 812 6312 TRAILING EDGE FLAP - NU