System Provider for the Boeing 787 Dreamliner

Moog is the system integrator for the 787 Primary Flight Control Actuation System (PFCAS) and the High Lift System. Moog is providing the design, integration and certification support for both of these systems. The Moog systems control the primary and secondary surfaces, horizontal stabilizer, leading edge slats and trailing edge flaps in response to pilot commands.

Primary Flight Control Actuation System

The PFCAS System controls 21 flight surfaces and includes a mix of electrohydraulic (EH) and electromechanical (EM) servoactuators and all associated control electronics. The system includes EH servoactuators with remote loop closure electronics for the ailerons, flaperons, inboard and outboard spoilers, elevator and rudder. The horizontal stabilizer trim actuator (HSTA) and mid-board spoilers employ EM servoactuators with associated motor drive control.

Key Features of the PFCAS System Include:

  • Smart actuators with onboard loop closure electronics
  • 5000 psi system operating pressure
  • High power motor controllers with active front ends
  • Electromechanical HSTA with dual load path and motor drive
  • Advanced materials for weight-performance optimization

High Lift System

The High Lift System includes the complete Flap and Slat Actuation Systems compromising nearly 450 discrete assemblies including: power drives, electronic controls, trim controls, geared rotary actuators, rack and pinion roller assemblies, transmissions shafts, offset gearboxes, sensors and accessory components. The High Lift System features a number of technical advancements to improve wing aerodynamics. To decrease system weight a number of advancements were also incorporated, including the use of advanced composites and increased use of electronic controls.

Key Features of the High Lift System Include:

  • Advanced flap trim control
  • Composite transmission components
  • 5000 psi system operating pressure
  • Hybrid hydraulic and electric power drive