Depends on the altitude of the aircraft. And, I suppose, the air speed. ;-) 73, Doug, W7KF http://www.w7kf.com <http://www.w7kf.com/> > On Jan 14, 2015, at 11:55 AM, Hans Hammarquist via TowerTalk <towertalk at contesting.com> wrote: > > Replacing a bulb on an aircraft is 'slightly" easier than climbing 1500 feet.