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.
  • 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
B737-700/800/900  Flight Controls - Pitch Control