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.
Collateral Quality Tests means the Collateral Quality Tests set out in the Investment Management Agreement being each of the following:
Collateral Quality Test means a test that is satisfied if, as of any date of determination, in the aggregate, the Collateral Loans owned (or, in relation to a proposed purchase of a Collateral Loan, both owned and proposed to be owned) by the Borrower satisfy each of the tests set forth below, calculated, in each case, in accordance with Section 1.04:
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.
Diesel engine means an engine which works on the compression-ignition principle.