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.
Compression Ignition Engine means an internal combustion engine with operating characteristics significantly similar to the theoretical diesel combustion cycle. The regulation of power by controlling fuel supply in lieu of a throttle is indicative of a compression ignition engine.
Dual-Fuel Engine means an engine that is designed to simultaneously operate with a liquid fuel and a gaseous fuel, both fuels being metered separately, the consumed amount of one of the fuels relative to the other one being able to vary depending on the operation;
Public aircraft means an aircraft used exclusively in the service of any government or of any political subdivision thereof, including the government of any state, territory, or possession of the United States, or the District of Columbia, but not including any government-owned aircraft engaged in carrying persons or property for commercial purposes.