TION. SERVICE BULLETIN ACTIONS REQUIRED FOR FASTENER SEALEANT IN THE FUEL TANK AND WIRE CLAMP FOR GROUP 1.4 AIRPLANES MOS 60 (s) SB 737-57A1294 WINGS - WING CENTER SECTION - UPPER AND LOWER SWINGERS - DRILL START INSPECTION AND REPAIR. NOT APPLICABLE - BY EFFECTIVITY SB FOUND SERVICE BULLETIN TO BE NA BY VARIABLE NUMBER (YG0