Bombardier Inc. is seeking investors for its aerospace businesses and considering a sale of some operations, people familiar with the matter said, as a turnaround plan at the Canadian planemaker faces pressure from potentially crippling U.S. tariffs on its marquee jetliner. The Montreal-based manufacturer is studying the disposal of assets including its Q400 turboprop and CRJ regional-jet unit, said the people, who asked not to be identified because the discussions are private. Airbus SE is among the suitors, they said, with one person saying Bombardier is also open to partnerships with other aerospace companies. Middle-market deals involving suppliers to the aerospace sector include: Kellstrom Aerospace Group Inc.'s purchase of airplane engine repair service provider Vortex Aviation Inc.; Aircraft Technical Publishers’, backed by ParkerGale Capital LP, acquisition of CaseBank Technologies Inc.; Liberty Hall’s purchase of ZTM Inc. to integrate with its portfolio company Accurus Aerospace Corp.; Platte River Equity’s deal for airplane engine tester CTS Engines; and Golden Gate Capital’s purchase of aircraft ground support equipment provider Tronair Parent Inc. Asset sales or investment deals in aerospace would raise money for Bombardier as it contends with newly imposed import duties of 300 percent on its C Series jetliner in the U.S., the world’s biggest aviation market. Bombardier also missed out on a merger of its rail-equipment business with Siemens AG’s operation after months of talks. Deals on the Q400 or CRJ may add life to languishing products, an analyst said. “Bombardier has neglected these products for so long,” said Richard Aboulafia, an aerospace consultant at Teal Group who adds that the Q400 may have an easier time finding a buyer than the CRJ line. “These should be worth more and should be more desirable.” The Q400 competes with planes made by ATR, which is owned by Airbus and Leonardo SpA. Bombardier’s regional jets go head to head with aircraft built by Brazil’s Embraer SA. Bombardier and Airbus, whose earlier talks on a potential business collaboration fizzled in 2015, declined to comment. No final decisions have been made and Bombardier deliberations with potential partners may not lead to any transactions, the people said. Bombardier Chief Executive Officer Alain Bellemare is trying to stop a cash drain after the C Series came to market more than two years behind schedule and about $2 billion over budget. The delays and cost overruns prompted Bombardier to accept a $1 billion investment from Quebec in the C Series program, plus another C$372.5 million ($300 million) from Canada. The company’s Global 7000 business jet has also been delayed. The U.S. Commerce Department recently imposed 300 percent tariffs against the C Series, saying Bombardier sold the narrow-body plane at less than its fair-market value after receiving government subsidies in Canada. The agency’s decision followed a complaint by Boeing Co. after Bombardier sold at least 75 of its planes to Delta Air Lines Inc., a deal valued at more than $5 billion based on list prices. Bombardier’s shares closed at C$2.32 on Oct. 13 and have risen 6.9 percent this year. The company got about 57 percent of its revenue from aircraft and aerospace parts last year. In 2015, Bombardier sold a stake in its rail business to Caisse de Depot et Placement du Quebec, Canada’s second-largest pension fund manager, for $1.5 billion. Last month, Siemens chose France’s Alstom SA as its merger partner in rail equipment. Bellemare has long talked about the need for Bombardier to improve margins of the Q400, which has lost market share in recent years to lighter, cheaper turboprops made by ATR. Bombardier is looking to move production of wings and cockpits for the Q400 outside of Canada to reduce costs, Vice President Todd Young said last month at a press briefing in Mirabel, Quebec. Colin Bole, a senior vice president of sales at Bombardier’s commercial aircraft unit, said at the same press briefing that the company has “a tremendous number of Q400 campaigns in the pipeline globally and we certainly intend to crystallize those in the next few months.” “I think you will see a dramatic change in the backlog,” Bole said. Additional Reporting By Mergers & Acquisitions' Kamaron Leach