The low pressure inlet pump feeds the high pressure second stage pump which feeds the main engine burn flow and engine actuator systems. Major benefits include:

• A reduced part count which lowers overall manufacturing and overhaul cost
• Cartridge type design which minimizes package size and weight
• Proven technology designed to handle extreme environments, severe fuel inlet conditions and worldwide harsh fuel (low lubricity) service

The single-stage high-pressure gear pumps have world-leading volumetric efficiency. This provides engine relight capability of below 4% shaft speed. Our latest generation gear pump has 60% fewer parts than previous generations, leading to low weight and high reliability.

Our two-stage fuel pump consists of a low-pressure side-channel boost stage and a high-pressure positive-displacement gear stage. The pump is mounted on and driven by the engine gear box. Its rugged cast housing provides the structural integrity required by the jet-engine environment and also provides a mounting point for the fuel control. Key features are listed below.

• Reduced part count lowers overall manufacturing and overhaul cost.
• Suction-boost stage provides dry lift for starting, as well as sufficient fuel pressure to charge the downstream gear stage.
• Proven technology designed to handle extreme environments, severe fuel inlet conditions and worldwide harsh fuel (low lubricity) service.

This pump is supplied as part of the complete engine control system for the Rolls-Royce Trent 1000 engine powering the Boeing 787. Aero Engine Controls' FLOWlinx^TM system twin-stage gear pumps offer excellent thermal rejection properties by switching in and out of a secondary stage for high power conditions. The unique DRIVElinx^TM design within the pumping unit keeps part-count, installation and weight to a minimum, while at the same time maximizing reliability.