Frank L.Petras;77;of 730 Speer st.;Belle Vernon;died on Tuesday;Oct.6;1992;at 12:55 a.m.in Mon Valley Hospital;Carroll Township. He was born March 7;1915;in Mt.Pleasant;a son of the late Victor and Victoria Vickertosky Petras. He was a lifelong resident of the Belle Vernon community and retired in 1980 as a buyer for Eisenstat Wholesalers of Mt.Oliver. Survivors include his wife;Lydia Pink Petras;two sons;Larry A.Petras of Carroll Township and Richard L.Petras of Fairmont;W.Va.;and three ggrandchildren;Eric Petras of Donora;Laura Petras of Carroll Township;and Margaux Petras of Fairmont;W.Va. He was preceded in death by five sisters;and one brother. Visitation and services will be private. Interment will be held at Belle Vernon Cemetery. Arrangements are being handled by the Leonard J.Parzynski Funeral Home;626 Broad Ave.;Belle Vernon.