Convair CV-990 SpantaxConvair 990 Spantax airplane model. Spantax (BX), a Spanish charter carrier, emerged as another significant operator of the Convair Coronado. In May 1967, BX acquired four 990s from AA, followed by an additional eight by 1972 and four more from Swissair (SR) in 1975. This made BX the largest operator of the Convair 990, with the aircraft remaining in their fleet well into the mid 1980s. Regrettably, the Convair 990 did not achieve the level of success