On June 5, 1969, Rivet Amber was lost at sea on a ferry flight from Shemya to Eielson AFB for maintenance, and no trace of the aircraft or its crew was ever found.
Den 5. juni 1969 styrtede Rivet Amber ned over havet under en flyvning fra Shemya til Eielson AFB for vedligehold og man har aldrig fundet flyet igen.