HOIST OPERATOR CALLED ELECTRICIANS AT 7:55 AM AND SAID #30 HOIST WAS DOWN. ELETRICIANS FOUND A BAD PROGRAM GEAR LOSS RELAY AND MADE REPAIRS AND RETURNED HOIST TO SERVICE AT 8:25 AM SAME DAY. M SHA WAS CALLED AND TOLD HOIST WAS DOWN AT 8:23 AM AND CALLED BACK AND TOLD THAT HOIST WAS BACK IN SERVICE AT 9:06 AM SAME DAY.