Possibly Textron. They were past possible suitors. And nobody said they were going to produce new Lears. The support side of the existing global fleet is rather tempting. As to the finances the debt load is bombardiers and not Lears. Time will tell.
The Learjet worldwide fleet is diminishing rapidly as newer, more efficient designs come to the fore. The legacy fleet is expensive to operate. Historically, the Lear 75 has been losing about 55% of its value after five years. Once they are depreciated, they have been sold by operators and replaced with a competitor's aircraft. Brand loyalty has all but disappeared.
Bombardier's revenues below are from left to right 2019, 2020, and profit (loss). As you can see, in 2020, all business aircraft sales provided $5.58B in revenues, and other aviation services $985MM. That indicates all support and MRO activities were 17.5% of Bombardier's 2020 total revenues, declining from 23% of 2019 total revenues. There was no further breakdown of MRO revenue between Global, Challenger, and Learjet divisions, but it's probable Learjet is a small portion of it. Profitability of the sector was not provided in their annual report, but aviation services revenue declined 57% in 2020.
This shows the MRO portion of Bombardier's business operations are not significant, and the slice attributable to Learjet is probably not enough to attract a sale. They will keep that business, simply because no one else will want it.
Revenues
Business aircraft $5,593B $5,417B 3 %
Other aviation $895MM $2,084B (57) %
Total Revenues $6,488B $7,501B (14) %
The Learjet division has debt on the books, separate from the parent Bombardier's Global and Challenger divisions. Any sale of Learjet will include those liabilities as a discount against the physical, monetary, and goodwill assets of the division.
Textron chose to eliminate several models when Cessna and Beechcraft were consolidated. It would make no sense to take on production of the Learjet 75 and 70. Any sales would come at the expense of CJ3s and CJ4s, and the market has indicated the Learjets are substandard in comparison to other light jets, particularly Embraer's.