AT 12:40 PM ELECTRICIANS LOCKED OUT #31 HOIST SO MAINTENANCE COULD PEFORM A SCHEDULED GEAR OIL CHANGE AND TH EHOISTMAN CALLED MSHA AT 12:55 AND TOL DTHEM HOIST WAS DOWN. MAINTENANCE WAS COMPL ETED AND HOIST RETURNED TO SERVICE AT 5:45 PM AND MSHA WAS CALLED AND TOLD HOIST WAS BACK IN SERVICE. WEST FORK HOISTMAN WAS NOTIFIED AT START AND END OF THIS SERVICE.