P. A. F.
It was an attempt by Piper to "idiot proof" what in their line was the entry level retractable.
By a simple means of low MAP sensing (closed throttle) and configuration interconnect if it sensed that the aircraft was in the "landing configuration" with the wheels up, it would put them down "automatically" for the pilot.
Problem was there were quite a few configurations flown during non landing ops that "tricked" the system into operation oftentimes exactly when you didn't need it, further confusing the "idiot" they were trying to "save".
It was good idea, but introduced a further and unneccesary complication into the retractable loop.
IJ will have a more concise description I'm sure
