On 22 June, MPs called for an investigation into THAI. It was alleged that there had been widespread corruption in the purchase of land, spare parts and engines, the sale of aircraft and rental of VIP aircraft, and the letting of the lucrative contract to fly to Phnom Penh to Bangkok Airways. Nukul agreed to hold an investigation. At the same time, he announced that ex-interior minister Anan was being replaced by a banker as chairman of the CAT board. Civilian appointees also replaced military members on the boards of the State Railways of Thailand, the Aeronautical Radio of Thailand, and TOT. The appointment of a civilian to head ART was unprecedented in the agency's 44 year history. The process of removing generals had commenced.