In July 1970, Lufthansa's first jumbo landed at Munich Airport with a Boing 747. Munich Airport wasn't really geared towards such large visitors. So he writes Munich Mercury:
When Lufthansa first appeared in Riem on July 8, 1970 in a Boeing 747, the Munich-based company had to improvise because the airport was only partially suitable for jumbo jets. Two conventional passenger stairs are combined with a lifting platform.