Wilmington, US-based Air Transport Services Group Inc. (ATSG) has said it may expand its fleet by acquiring three B767-300 aircraft. ATSG is the parent corporation for ABX Air whose biggest customer was DHL Express before the German express and logistics company decided to pull out of domestic operations after years of losses. ATSG President and CEO Joe Hete said he is excited about the potential fleet expansion. ATSG’s aircraft leasing business recently executed a letter of intent for the purchase of three 767-300 extended-range, passenger-configured aircraft, which will be converted to freighters and begin flying by 2011.