Depends which pension scheme you are in - if you are on AFPS75 then yes it's 2 years - for the new one AFPS15 then no as it's earnings based - not sure about AFPS05 as not on it. Besides, as of 1 Apr 15 everyone (except for a few exceptions who had less than 10 years to go to Age 55 on a pre-determined date) will be on AFPS15. Of course, the caveat being, any pension rights you aquired prior to this date will be frozen and apply at the rank you subsequently leave the RAF at. Confused.........just google AFPS, you will find shed loads of info.