B737-700/800/900 Flight Controls
Pitch Control
The pitch control surfaces consist of hydraulically
powered elevators and an electrically powered
stabilizer. The elevators are controlled by forward or
aft movement of the control column. The stabilizer is
controlled by autopilot trim or manual trim.
The pitch control surfaces consist of hydraulically
powered elevators and an electrically powered
stabilizer. The elevators are controlled by forward or
aft movement of the control column. The stabilizer is
controlled by autopilot trim or manual trim.
- Cables connect the pilots’ control columns to
elevator power control unit (PCUs) which are
powered by hydraulic system A and B. The
elevators are interconnected by a torque tube.
- In the event of a control column jam, an
override mechanism allows the control
columns to be physically separated.
- The horizontal stabilizer is
positioned by a single electric
trim motor controlled through
either the stab trim switches on
the control wheel or autopilot
trim. The stabilizer may also be
positioned by manually rotating
the stabilizer trim wheel.
Flight Controls SGR
