The timing of Virgin Blue's entry into the Australian market was fortunate as it was able to fill the vacuum created by the failure of Ansett Australia in September 2001. Ansett's failure allowed Virgin to grow rapidly to become Australia's second domestic carrier, rather than just a cut-price alternative to the established players. It also gave Virgin access to terminal space without which growth would have been significantly limited. Delays in negotiating access to the former Ansett terminal at Sydney Airport however forced Virgin to use its original terminal there—a collection of prefabricated buildings without aerobridges—longer than was needed. As the airline grew, it acquired new equipment, enabling it to phase-out its older 737-400s in favour of 737-700 and -800 series aircraft with modern glass cockpits, winglets and greater fuel efficiency.