The one labeled as "1" in the picture. And I'm having doubts about "2", it is an air supplier for cabin, right? Or am I wrong?
Thank you.
The one labeled as "1" in the picture. And I'm having doubts about "2", it is an air supplier for cabin, right? Or am I wrong?
Thank you.
The item 1 is a Krüger flap, a leading edge device which allows the wing to operate to a higher angle of attack. The wing-root fairing makes a small triangular segment necessary; outboard of it slats are used.
The item 2 is a NACA inlet for cabin air, as commented by @mins.
1) Appears to be where the inboard leading edge slats retract into. 2) Ram air inlet for the air conditioning/equipment cooling.