This July 13, 2010, photo provided by The St. Ignace News shows the wreckage of small plane that crashed after takeoff from the Mackinac County Airport in St. Ignace, Mich. The pilot Moshe Menora, 73, of Skokie, Ill., and three of his granddaughters Rikki Menora, 16; Rachel Menora, 14; and Sara Klein, 17, visiting from Israel were killed in the crash. A 13-year-old grandson Yossi Menora, who was hospitalized after being ejected from the aircraft, was the only survivor. (AP Photo/The St. Ignace News) MANDATORY CREDIT, NO SALES
The lone survivor of a small plane crash that killed four family members remains in serious condition, but is slowly improving.
Joshua Menora, 13, was burned over 60 percent of his body when he was thrown from the plane his grandfather was piloting as it crashed on Interstate 75 in Michigan, flipped over and burst into flames.
Menora was a well-known business man in Skokie.
The Federal Aviation Administration and the National Transportation Safety Board continue to investigate the cause of the crash.