York City Transit Authority (NYCTA) ordered 430 cars for the train. This route would run to the World's Fair grounds in Flushing Meadows in Queens. The first 40 cars were singles (R33S), with the rest being R36 cars; single cars were needed since the service runs 11-car trains, and R36 cars were built only in pairs. The first R36 cars ("World's Fair" cars 9558–9561) arrived in fall 1963, shortly after the R33S cars began arriving in September that year. The first train of R33S and "World's Fair" R36 cars was placed in service on the route on October 24, 1963. With the fair opening approaching on April 12, 1964, "World's Fair" R36 cars were built and delivered in larger quantities that fall. More "World's Fair" cars arrived throughout 1964, enough to displace the R12s, R14s, and R15s from the train by the close of 1964. The "Main Line" R36s entered service on the almost a year later, on July 24, 1964. The cars were first assigned to the , , and until February 16, 1966, when they were moved to the . Late 1960s–Mid 1980s The "Main Line" R36s stayed on the until October 1968, when cars 9530–9539 were moved to the and . When the GE R12s were sent to the (Third Avenue elevated line) in August 1969, the remaining cars assigned to the were moved to the and to join the rest of the "Main Line" cars assigned there. In April 1972, "Main Line" R36 pairs 9524–9525, 9532–9533, 9536–9537, 9540–9541, 9544–9545 and 9548–9549 were moved to the , with Westinghouse "World's Fair" pairs 9376–9377, 9408–9409, 9418–9419, 9474–9475, 9496–9497 and 9516–9517 being moved to the and . The swap was reversed in May 1973, when the "Main Line" pairs returned to the and , and the Westinghouse "World's Fair" pairs returned to the . On October 22, 1976, Westinghouse "World's Fair" R36s 9504–9523 were moved from the to the and to supplement the "Main Line" cars. From June 2, 1978, to May 1979, Westinghouse "World's Fair" R36s 9494–9503 were assigned to the train. Those cars were also used on the and in February 1979. On April 27, 1981, "Main Line" R36s 9548–9557 were moved from the and to the to relieve a car shortage on the line. The cars returned to their home lines on August 17, 1981. On January 10, 1983, Westinghouse "World's Fair" R36s 9504–9523 and the