event has been cited as a main deterrent to Canada's efforts to develop modern passenger rail. Initial commercial service started soon after. On its first westbound run the Turbo attained 10 minutes outside of Dorval. During speed runs on April 22, 1976, it achieved near Gananoque, the Canadian record to this day. However, in regular passenger service the Turbotrains were limited to 95 mph (153 km/hr) in Canada because of the Canadian route's numerous grade-crossings, estimated at 240 public highway grade-crossings and 700 agricultural or private crossings between Montreal and Toronto. Technical problems, including brake systems freezing in winter, required a suspension of service in early January 1969. Service resumed in May 1970; however, technical problems again caused the Canadian National to withdraw all Turbotrains from service again in February 1971. At this point, the CN management publicly expressed great dissatisfaction with these trainsets, with one vice-president claiming, "the trains never did measure up to the original contract and they haven't yet"; the manufacturer United Aircraft Company publicly claimed that CN suspended Turbotrain service for relatively minor technical problems. Railroad analysts, including Geoffrey Freeman Allen (editor of Jane's World Railways), noted that the Turbotrains employed too many advanced, derived technologies which had been packed in "without extended practical evaluation in railroad conditions. From transmission to suspension to auxiliaries, far too many vital components seemed to have been translated straight from the drawing board to the series production line. During the "downtime" CN changed their plans, and in 1971 a rebuild program began, converting the five seven-car sets to three nine-car sets. Several minor changes were added. The engine exhaust fouled the roof windows of the power car, so these were plated over, and a grill was added to the front of the engines just behind the clamshell doors. The remaining power and passenger cars were sold to Amtrak as two 4-car sets. One of those sets sideswiped a freight train on a test run in July 1973 and three of the cars were written off. The sale of the surviving Power Dome Coach car was cancelled, and it stood spare until a sister unit caught fire and burned in September 1975. The three rebuilt 9-car sets entered service for CN in late 1973. CN ran the Turbos from Toronto-Montreal-Toronto with stops at Dorval, Kingston and Guildwood on the Quebec City-Windsor Corridor. Original train numbers were Train 62 which left Toronto