Helen M.Banshak;88;of North Charleroi;died Friday;May 8;1992;in Mon Valley Hospital;Inc.;Carroll Township. Born Aug.30;1903;in Larimer;she was the daughter of the late Charles I.and Emma Mull Keister. Mrs.Banshek was a member of the Presbyterian Church;Charleroi;and the order of the Eastern Star. Surviving are one daughter;Mrs.Warren (Patricia) Houseman of Mapleview;and two grandchildren;Mrs.Ronald (Linda) Johnson of Bentleyville and Warren C.Houseman of Irwin. In addition to her parents;she was preceded in death by her husband;Vincent J.Bruno Banshak;a brother;R.G.Keister;and a sister;Ruth K.Fisher. Friends will be received Sunday from noon to 3 and 7 to 9 p.m.in the Schrock-Hogan Funeral Home Inc.;226 Fallowfield Ave.;Charleroi. Private services;followed by interment in Belle Vernon Cemetery;will be held Monday.