This isn't too bad, but I suggest doing it on Easy/Normal instead of during your hard run, especially as there are no checkpoints to help you out. Don't get too comfortable once you're on the helicopter, as there will be one more QTE sequence after the L1/R1 one.
Solution taken from PlayStation Trophies:
https://www.playstationtrophies.org/game/indigo-prophecy/tro...