The A340-500IGW (Increased Gross Weight) version has a range of and a MTOW of and first flew on 13 October 2006. It uses the strengthened structure and enlarged fuel capacity of the A340-600. The certification aircraft, a de-rated A340-541 model, became the first delivery, to Thai Airways International, on 11 April 2007. Nigerian airline Arik Air received a pair of A340-542s in November 2008, using the type to immediately launch two new routes, Lagos–London Heathrow and Lagos–Johannesburg; a non-stop Lagos–New York route began in January 2010. The A340-500IGW is powered by four thrust Rolls-Royce Trent 556 turbofans.