Airbrake how to retract?

  • I used the search function but couldn't find an answer:

    I was flying the F15 the ohter day and couldn't figure out a way to retract the enormous airbrake (the one behind the cockpit). Default key for airbrake is B and the airbrake indeed does deploy when I push it, but pushing it again doesn't retract it?

    Thanks in advance for any help.