Terror in the Sky

Terror in the Sky is a low budget 1971 television film remake of 1957's "Zero Hour!", which itself was based on the 1956 television play "Flight into Danger". Arthur Hailey recycled the premise in his book "Runway Zero-Eight" which was co-written with John Castle in 1958. The film stars Doug McClure, Lois Nettleton, Roddy McDowall, Leif Erickson, Kenneth Tobey, and Keenan Wynn.
Plot.
Passengers on a plane headed from the Midwest to the West Coast (Winnipeg to Vancouver in the book; Minneapolis to Seattle in the film) get quite ill after eating the chicken pot pie entree. Both pilots also ate the chicken. Passenger George Spencer, a man who has not flown since the Vietnam War (single-engine planes in the book, helicopter/war choppers in the film), is reluctantly pressed into flying the plane, where he makes a very neurotic, but survivable landing.