MPX5139079: The arrival of the first Boeing 747 'Jumbo Jet' at Heathrow Airport. The aircraft had been delayed for three hours in New York where one of the fan jet engines had been giving trouble and had to be replaced. The aircraft carried over 300 employees of the airline Pan-Am, on this proving flight before the plane enter normal service. 12/01/1970 (b/w photo) / Bridgeman Images