OS 72 71.5 22-AUG-2008 22-AUG-2014 154 28.045 HRS/MSC 492:31 3260:48 REF: AFL 140 782 + 28-010-00 28.190 GENERAL VISUAL INSPECTION OF THE MAIN AND CENTER FUEL TANK (WING) EXTERNAL LOWER SURFACES INCLUDING TANK VENTS. SUMP DRAIN VALVES. SKIN LAP JOINTS FOR OBVIOUS LEAKS. CONDITION. AND SECURITY REF: EITC 28-01