Isn't that Captain Joe Patroni (played by George Kennedy) inspecting the wheel well of Concorde in Airport 79?
He's making sure that the sidewinder missile detection system is serviceable. Devotees of the Airport series will recall that Joe managed to avoid being shot down by a sidewinder, by opening the DV window (which, being a European aircraft in the case of the Concorde, was on the right hand side) and firing a flare to fool the missile.
Absent a serviceable sidewinder detection system (and a rear view mirror and a very strong arm) Captain Joe wouldn't have been able to save the Concorde.
As I recall, the sidewinder detection system was fitted in the left hand MLG well in –200 models of the Concorde. An amazing piece of technology, given that the sidewinder was a passive missile.