shares of boeing co ba climbed 14 in morning trading and have rallied 52 amid a threeday win streak after aar corp air announced a deal to buy nine boeing 757200 passenger aircraft financial terms of the deal were not disclosed aar which provides aviation services to commercial and government operators said its aar supply chain subsidiary was buying the aircraft which will be equipped with 18 rollsroyce rb211 engines from american airlines aar’s stock slipped 03 in morning trading “the acquisition of these aircraft and engines will enable aar to continue to support the rb211powered 757 cargo market”