I have a 1973 piper arrow. I have an unusual problem which is been bugging me for some time. When I retract my landing gear, the yellow caution light for the gear goes on and stays on after the wheels are fully retracted. I had this checked on the ground with a gear swing. The yellow light does not stay on while it's being tested on the ground. This only seems to happen while flying in the air. Has anybody else seen this problem?