The first Learjet 28, used by Neil Armstrong to set 5 FAI records in 1979. Donated to the Armstrong Museum in August 2020, flown into the airport that bears his name, AXV. Moved to the museum grounds proper in June of 2022. Built in 1979, originally N9RS (as she was when Neil flew her), to N9KH, N128MA, N3AS, becoming N128LR in 2004 with Shamrock Foods, keeping that reg with several owners until her donation.

The first of only five built! The unsuccessful Gates Learjet 28 Longhorn is based on the 25 but introduced a new increased span wing fitted with winglets, which improved fuel efficiency and overall performance, particularly payload range and fuel economy. The Longhorn 28 seats up to eight passengers.