Air Transport Group agrees to acquire planes and engines from United Airlines for $32 million. UAL Corp., the parent of United Airlines, reached a deal to sell 16 Boeing 767-222 aircraft and five spare engines to the Air Transport Group Inc. for $32 million, according to a papers filed in bankruptcy court. The proceeds will be used to pay down UAL's debtor-in-possession loan. UAL tried to sell the planes and parts for nine months, attracting three bids including the one from Air Transport, according to the court papers. UAL will need bankruptcy court approval for the deal at a hearing on March 19.