Bombardier has emerged as a pure play business jet maker after divesting assets including the sale of its transportation business to Alstom, which it completed in January, to pay down debt and boost earnings.

The company said it launched consent solicitations with respect to outstanding senior notes or debentures, following the claims by the unnamed bondholder that the asset sales constitute a breach of certain covenants under the indenture governing the 2034 notes.

Bombardier said in a statement these claims are without merit and it has not breached any covenant, adding that after evaluating various options it had determined requesting bondholders to amend the terms of the bonds was the most "expedient and efficient path" to maintain value and protect itself and its stakeholders.

If the amendments are approved, Bombardier will make a consent payment of $1.25 per $1,000 principal amount for applicable series of notes, and C$1.25 per C$1,000 principal of Canadian dollar-denominated 7.35% debentures due 2026, the statement said.

Bombardier also flagged early first-quarter revenue that would beat analysts' estimates, as rising vaccinations encourage wealthy travelers to return to flying.

Bombardier reports earnings on Thursday.

The jet maker said it expects first-quarter adjusted earnings before interest, taxes, depreciation, and amortization (EBITDA) from continuing operations of $123 million, above analysts' average estimate of $89 million, according to IBES data from Refinitiv.

The company expects business jet revenue to rise by 18% to $1.3 billion in the first quarter, from a year ago, beating Wall Street's estimate of $1.18 billion.

Bombardier stock closed up 3.3%.

While deliveries are roughly the same, Bombardier's product composition is shifting toward its flagship Global 7500 jets, a revenue driver.

Bombardier said it remains on track to deliver between 110-120 business aircraft in 2021. The company's full-year deliveries fell 20% to 114 jets in 2020.

(Reporting by Ankit Ajmera in Bengaluru and Allison Lampert in Montreal; Editing by Shailesh Kuber and Karishma Singh)