Die Jungen Tiger von Hongkong - Robert Woods (1969) - Kai Tak Airport - Part 2, Kowloon City

The second trip to Kai Tak in this film is when the two protagonists manage to bluff their way as chopper pilots for the dodgy shipment to Singapore by planting drugs on the helicopter to get the original pilots arrested. It looks like the film company had a free run of a section of the apron at the southern end of the airport but I'm sure there are people out there who might be able to better pinpoint it.