Interesting Hold

flightaware.com/live/flight/N52EL

Check out this flight!

If this is the flight on 13 Apr that went from PAE back to PAE, it may not have been a hold. The aircraft owner is Honeywell. It was probably a test flight.

(Added) After posting this, I checked the aircraft registry. The airworthiness certification for N52EL is “experimental.” To me, this confirms that this was a test flight of some type.