Engines (Aircraft 4)

Engines (Aircraft 4). Two (2) Rolls-Royce BR700-710C4-11 engines bearing manufacturer's serial numbers 15381 & 15380, together with any and all Parts so long as the same shall be either incorporated or installed in or attached to such Engine. Any engine which may be, from time to time, substituted for an Engine shall be deemed to be an Engine and subject to this Agreement for so long as it remains attached to the Airframe.