 From 26 May 1977-27 October 1977, "Flagstaff" only managed 305.2 hours of operating time, including only 71.6 hours of foil-borne time.In March 1978, she suffered a transmission failure and the nail in her coffin was the deterioration of her turbine.The only solution to the latter problem was to replace the turbine, and the cost of that was prohibitive.