An ownership change from Quicksilver Manufacturing to Quicksilver Aeronautics, located in Temecula, Calif., triggered a rule requiring the FAA to determine that 51 percent of the kit is built by the owner, in order to qualify for the experimental amateur-built category. Several kits have now received a letter of authorization showing that approval.
The FAA evaluated the MX Sport, MX II Sport, MX Sprint, MX II Sprint, and the Sport 2S; two of the models are single seaters and three are side-by-side two-seat aircraft. Between them, the models have delivered nearly 15,000 kits. The FAA has added them to its Revised Listing of Amateur-Built Aircraft Kits on the agency's website.
Quicksilver makes the GT 400 single-seater and GT 500 tandem two-seater. Both GT series models have been previously approved.