Diesel engine means an engine which works on the compression-ignition principle.
Replacement Engine means a [Engine Manufacturer and Model] engine (or an engine of the same or another manufacturer of a comparable or an improved model and suitable for installation and use on the Airframe with the other Engine (or any other Replacement Engine being substituted simultaneously therewith)) that shall have been made subject to the Lien of the Indenture pursuant to Section 7.04 or Section 7.05 thereof, together with all Parts relating to such engine, but excluding items installed or incorporated in or attached to any such engine from time to time that are excluded from the definition of Parts.
Engine under the Lease. The term "Engines" means, as of any date of determination, both Engines then leased to the Lessee pursuant to the Lease.
parent engine means an engine selected from an engine family in such a way that its emissions characteristics will be representative for that engine family;
Engines means, as of any date of determination, all Engines then leased hereunder.