Nick, for the very first time I have to disagree. There was another one from the seventies called something very like 'Flight into Danger' (dreadful title but the only bad point of the film) starring Larry Hagman. At the time he was quite the helo pilot, and judging by the flying he was allowed to get away with by the film's producers, he was the film's producers.
The in-cockpit footage corresponded exactly to the things we saw his 500 doing from outside, and it was him flying it, without a shadow of a doubt. There's dialogue between him and the leading lady shot from the right-hand side of the cabin, while in the background the horizon swings up and down as they tear along at low level.
An Allouette II breaks the glass roof of a building with its skids (shot from inside the glass building and the helo); the 500 flies through a dockside shed (shot from outside and inside, Hagman flying); there's a chase between the Allouette and the 500 along a main street, skids scraping the ground; the 500 gets looped, can't remember if it's round a bridge; and on, and on, and on. In the opening, we even get to see the entire start sequence (in the hangar, and he goes on to play football with two kids using the skids). Stunning stuff!