N121U - 1947 Aero C-104 Aircraft Registration

N121U is a 1947 Aero C-104, a single-engine reciprocating (piston) aircraft registered to Schafhausen Mark G in Spokane, WA. This aircraft holds a experimental airworthiness certificate issued by the Federal Aviation Administration on July 23, 2013. The registration certificate was issued on February 17, 1977. The registration is set to expire on August 31, 2029. Powered by a Superior XP-0-360B1AC2 engine producing 180 horsepower, N121U is. The aircraft's Mode S transponder code is A0592B (hex), used for ADS-B identification and flight tracking. N121U was last tracked by AviatorDB at coordinates 45.5887, -122.5980 on July 16, 2025. The FAA registry record for N121U was last updated on August 25, 2023. AviatorDB monitors aircraft positions through ADS-B surveillance data and updates records as new position data is received.

Aeronca (Aeronautical Corporation of America) was an American aircraft manufacturer that produced iconic light aircraft from the 1920s through the 1950s. The Aeronca Champion and Champ remain popular vintage and tailwheel training aircraft. AviatorDB tracks 30 Aero aircraft currently registered in the FAA database, including the C-104 model.

AviatorDB has found no NTSB accident or incident reports involving N121U. AviatorDB cross-references all FAA registration data with NTSB accident and incident reports, providing a comprehensive safety overview for every registered aircraft in the United States.