Mine was sent directly to HR as well as a LOR on airline apps. I've been told that all this does is put you in a smaller stack, no guarantee for an interview just better odds. I have heard there are 4 stacks apps go into based on various events like Conference/job fair attendance will move you up one stack, a CP meet and greet will move you into another smaller stack, doing a conference/job fair + a CP meet and greet will move you to the smallest stack at UAL.