Airlines Boeing 727s crash landed (with a landing gear problem) at the Murtala Mohammed International Airport, Lagos on 29 December 2004 after a flight from Port Harcourt. The 81 people on board were uninjured and there was no major damage to the plane. As a result, the remaining 5 Boeing 727s were grounded to enable investigators to carry out in depth inspections on the aircraft. On 3 January 2005 the Nigerian Civil Aviation Authority (NCAA) permitted the resumption of full flight operations. Following the crash of Sosoliso Airlines flight 1145 on December 10, 2005, President Olusegun Obasanjo grounded both Sosoliso and Chanchangi Airlines. Chanchangi's grounding was based on a report that its operations were unsafe. After passing inspections by Nigeria's aviation ministry, Chanchangi was allowed to resume operations on December 22, 2005. A Boeing 727 en route to Abuja was forced to return to Lagos on May 9 after the crew reported a problem with the aircraft's air conditioning system. On August 22, 2006, two tyres burst on a Boeing 727 with 98 passengers on board. The pilot reportedly made a hard landing to grip with the wet runway after a heavy rain at Nnamdi Azikiwe International Airport in Abuja. There were no casualties. Chanchangi suffered multiple safety incidents and near-accidents in mid/late 2007. A Kaduna-Lagos flight was aborted after an engine blade broke off about twenty minutes into the flight. In mid September, a Lagos-Abuja flight returned to Lagos after hydraulic leakages were discovered. On February 22, 1998, Chanchangi Airlines' chief pilot asked Air Traffic Control (ATC) at Kaduna, Nigeria for permission to conduct flight training within the airport's circuit using a Chanchangi Airlines Boeing 737-2K3 (leased from Aviogenex, registered YU-ANU) which had arrived from Lagos approximately one hour earlier. As visibility had reduced to 600 meters, he was told it was below the minimum allowed for landing and his request was not feasible. Next, the pilot requested he be allowed to conduct rejected take-off training, and permission was subsequently granted by ATC. Several individuals joined the captain for the exercise. He was instructed to begin the training on Runway 05, and once in position permission for "takeoff" was given. Normally, any single rejected takeoff at high speed would require a minimum of ten minutes to allow the brakes to cool before the aircraft could be safely operated again, and depending on various factors, this time period could be