HOIST BRAKE WOULD NOT RELEASE. CALLED ELECTRICIAN AND HE INSTALLED A NEW BRAKE WEAR LIMIT SWITCH. MSHA WAS CALLED AT 8:50 P.M. WEST FORK MINE WAS CALLED AT 8:55 P.M. HOIST WAS RETURNED TO SERV ICE AT 10:30 P.M. AND MSHA WAS CALLED AT THAT TIME. WEST FORK HOISTMAN WAS CALLED AT 10:35 P.M. AND BOTH WERE TOLD HOIST WAS BACK IN SERVICE.