- Power unit, bearing system and transmission
- Fuel and oil system
- Control and hydraulic system
- Fuselage, landing gear and pneumatic system
- Fire-fighting, de-icing systems and heating and ventilation systems
- Electrical equipment units and switching equipment
- Lighting equipment
- Control devices for motors and gearboxes
- Control devices for fuel, hydraulic, pneumatic and electrical systems
- Flight and navigation equipment
- Monitoring equipment
- Helicopter navigation equipment
- Radio communication equipment