also utilized by Metro for flights between IAH and Beaumont/Port Arthur (BPT) where one was destroyed by a tornado in 1983 while sitting empty on the airport ramp (see Accidents and incidents below). In 1972 the airline carried between 90,000 and 100,000 passengers per year. It displayed a profit of $156,510 U.S. dollars in an eight-month period. In 1978 Metro entered the "stand up widebody cabin age" when the first orders for five (5) Short 330 twin turboprops were announced. These Irish-manufactured aircraft would be used to complement the Twin Otters already in use on higher demand routes as well as new service to Lafayette, LA and Lake Charles, LA and offered far more comfortable seating for passengers. The addition of the 30 passenger Short 330 turboprops required Metro to make provisions for flight attendants and also resulted in the carrier joining the ranks of the regional airline industry via its use of larger aircraft. The company was also independently operating flights from the Dallas/Fort Worth Airport (DFW) at this time with DHC-6 Twin Otter and Short 330 aircraft with services to several destinations in east Texas with some of these flights continuing on to or originating from Houston Intercontinental (IAH). These Twin Otter and Short 330 passenger services into DFW were flown by the Metroflight Airlines division which would eventually operate American Eagle flights. Metroflight also independently served several destinations in Oklahoma and north Texas from Dallas/Ft. Worth and Oklahoma City (OKC). In 1982 Metro purchased fourteen (14) Convair 580 aircraft from the original Frontier Airlines. These 50 passenger twin turboprops were then used to initiate the first ever American Eagle service via a new code sharing passenger feed agreement with American Airlines. The Convair 580 aircraft were operated by the Metroflight Airlines division which also flew DHC-6 Twin Otter aircraft on American Eagle services. Metro Airlines operated out of Dallas/Fort Worth International Airport via its wholly owned Metroflight division under the American Eagle brand beginning on November 1, 1984. In 1985 the airline announced that it would end service to Houston Intercontinental Airport (now George Bush Intercontinental Airport). Royale Airlines, a commuter/regional air carrier based in Louisiana, then assumed many of the routes that were previously operated by Metro into Houston. However, in 1987 Royale declared bankruptcy and ceased all scheduled passenger flight operations. Acquisitions and subsidiaries Metro Airlines spun off its certificated airline, being Metro Airlines, and