sentences:  As of March 2019, the highest serial number of any 402 Lancer in the FAA aircraft registry was 25.As of 2018, FAA flight test standards require a pilot to demonstrate feathering a propeller during the practical test to obtain a multiengine rating; this effectively makes it impossible to complete the test in a Lancer with its fixed-pitch props.Despite the aircraft's drawbacks, Lancer ownership has been described as potentially attractive because it is "...an oddity and rarity of aviation..." and "Its appearance does attract and invite attention."