Hard to tell from the picture, sorry. But it looks like it is just about out.
Have you been assisting?
As Sally said a while back, you can see and assess the best.
Can you tell if it is fully absorbed?
If you are assisting, perhaps remove a bit more of the shell along the zip line, on the left side. It will likely push the cap right off the air cell from what I can see.
I may be wrong on this, but you can judge best what needs to be done.