Jean Gertrude Block was 58 when she and her husband John boarded their private green and white Cessna 150J, tail number N50935, at Macomb Airport around 11:10 a.m. on July 4, 1977. They planned to fly to Lost Creek Sky Ranch Airport in Luzerne to spend the holiday with their son, but neither the couple nor the airplane ever reached their destination.

Weather worsened that day as severe thunderstorms and a derecho moved across Michigan. John Block, a pilot with about 30 years of experience who was not instrument-rated, relied on visual navigation. Investigators have suggested he may have become disoriented in poor conditions and taken the wrong interstate. An unconfirmed sighting placed the aircraft at a closed airstrip in Charlotte, Michigan, where the couple reportedly departed again heading north without refueling.

Extensive searches by the Air Force, Coast Guard and law enforcement concentrated on the Huron National Forest and Atlanta State Forest but turned up no wreckage. The family has asked hunters and outdoor visitors to keep watch for any sign of the plane. Did anyone in the area around July 4, 1977, see a small Cessna or anything that could explain what happened to Jean and John Block?