Ilyushin Finance has agreed to the majority of terms with Bombardier on its order for 30 CSeries aircraft.
The parties still must reach an agreement on issues relating to performance and after sales support before the Russian lessor finalises the sale, says Alexander Rubtsov, general director of Ilyushin, at the Farnborough air show today.
Ilyushin plans to finalse the deal by the end of September.
The lessor has also converted its tentative agreement to all 130-seat CS300 aircraft, which is split between 10 firm orders, 10 options and 10 purchase agreements. It previously had seven firm CS300s and three 110-seat CS100s and 20 options and purchase rights.
The CSeries will replace older jets, for example the Tupolev Tu-154.
Ilyushin announced the tentative agreement at the MAKS Moscow air show in August 2011.