l Compliance Next Due Disposition MOC SL 737-SL-28-060 I9-OCT-2001 SHORT SCREWS INSTALLED ON ENGINE FUEL SHUTOFF VALVES. CROSSFEED VALVE. AND DEFUEL VALVE. SERVICE RECOMMENDED LETTER MOS SL 737-SL-28-060 REV. A SHORT SCREWS INSTALLED ON ENGINE FUEL SHUTOFF VALVES. CROSSFEED VALVE. AND DEFUEL VALVE.