Chinese but Irish-based aircraft leasing firm CALC has pushed back against claims by Willis Lease Finance that it failed to return an engine in adequate condition. Last month, aircraft engine lessor Willis Lease Finance, via its trustee Wells Fargo, launched legal proceedings in the US against CALC’s Irish-registered headquarters. It claimed that both sides had a contract for the lease of an engine to CALC but that the maintenance and upkeep of the engine, as allegedly stipulated in the contract, was not adhered to by the Chinese firm. Wells Fargo, in its complaint, said that with the engine not being…