In the photo above, the bottom of the board is facing to the right. In order to pull the board out this far, you must remove the lines from the tail. If you do this, don't forget to mark the lines somehow so you know which one goes on which side of the tail.

To get it out any further, you will have to cut the power lines to the motor, or remove the motor, which is what I did.

I would avoid pulling the lines and the antenna completely inot the boom as you might have trouble threading them back through.

Most likely your line is OK, but these photos might be helpful in understanding the insides of the bird.