Designed as a STORL tactical military transport aircraft, the YC-14 was Boeing's entry into the Air Force's Advanced Medium STOL Transport (AMST) competition. It was aimed to replaced the C-130 as the USAF's standard STOL tactical transport. Although the YC-14 and the competing McDonnell Douglas YC-15 were succesful, neither aircraft went into production. The AMST project was ended in 1979 and replaced by the C-X program. The C-X program eventually led to the development of the C-17 Globemaster.
This photo was added on 10 November 2020, and has since been viewed 926 times.