GE90

Avio is responsible for the design, development, production and MRO of the accessory drive train (transmission command accessories), a sector where Avio is world leader.

The accessory drive train includes:

• inlet gearbox: takes motion from the fan and transfers it through the radial shaft to the transfer gearbox
• transfer gearbox: transfers motion from the radial shaft to the horizontal shaft
• accessory gearbox: transfers motion from the horizontal shaft to the 8 accessories of the engine and aircraft

Avio, under the aegis of GE, is responsible for the design and development of the sixth-stage rotor blade and production of some components of the low-pressure turbine (from second- to sixth-stage stator blades, sixth-stage disc and rotor blade).

Main features of the low-pressure turbine

The basic architecture of the low-pressure turbine module derives from previous versions of the GE90, preserving the flow path and existing mechanical interfaces.

The main features include:

Rotors:

• Inclusion in the early stages of materials able to withstand increased operating temperatures
• Reduced calculation of aerodynamic profiles consistent with the objective of reducing full volumes in the turbine project
• Re-designing the sixth stage to reduce weight and increase efficiency compared to its predecessor, the GE90-92B

Stators:

• Inclusion in the early stages of materials able to withstand increased operating temperatures
• Reduced calculation of aerodynamic profiles consistent with the objective of reducing full volumes