He also purchased a coal mine business, Mount Victory Coal Company in Somerset, Kentucky. Guterma died on April 5, 1977 in a crash of a private aircraft near La Guardia Airport, along with his wife and four of his children. A son, Marc, survived the crash, but died in another airplane crash in 1985 on Delta Airlines Flight 191 near Dallas-Fort Worth International Airport. Another son, Robert, was not on the plane. The aircraft was owned by Mount Victory Coal Company.