Berlin Tegel Airport the steady decline in scheduled domestic air traffic from and to West Berlin was arrested and reversed. The first expansion in Pan Am's Berlin operation since the move to Tegel occurred during that year's Easter festival period, when the airline temporarily stationed a Boeing 707-320B at the airport to cope with the seasonal rush on the prime Berlin–Frankfurt route. From late 1979, Pan Am began updating its Berlin fleet. This entailed phasing out all 727-100s by 1983. The first stage involved replacing two of the 13 German-based aircraft with a pair of stretched Boeing 727-200s originally destined for Ozark Air
Berlin Tegel Airport with the airline's transatlantic services at the latter airport, Pan Am withdrew its non-stop Tegel–JFK service at the end of the summer timetable, in October of that year. Following the cessation of direct Tegel–New York City scheduled services, Pan Am continued to operate affinity group/Advance Booking Charter (ABC) flights from Tegel to the US on an "ad hoc" basis. From the start of the 1974–75 winter season, Pan Am began operating a series of short- and medium-haul week-end charter flights from Tegel under contract to a leading West German tour operator. These flights served popular resorts in the Alpine region