Repair and maintenance services of aircraft engines. Repair and maintenance services for BBMF Dakota aircraft engines. Requirement for an enabling contract to provide, separately, both a supply of aircraft engine spares and a spares inclusive repair and overhaul service to the BBMF for Pratt and Whitney engines. The repair and overhaul element of the contract will be spares inclusive and includes the bay maintenance of associated engine components. The supply of spares will be in addition to those required for the repair and overhaul and will be supplied on an as required basis.