AIRPLANE
OPERATIONS
MANUAL
FLIGHT CONTROLS
REVISION 41
2-13-25
Page
1
Code
01
Copyright © by Embraer. Refer to cover page for details.
AOM-145/1114
GUST LOCK SYSTEM
A gust lock system is provided to lock the elevator to avoid damage to
elevator components in the case the aircraft is subject to strong gusts
on the ground. The aileron and rudder surfaces do not need to be
mechanically locked since their actuation systems naturally damp any
undesired movement.
There are two different gust lock systems:
Mechanical Gust Lock System
Electromechanical Gust Lock System
MECHANICAL GUST LOCK SYSTEM
The gust lock system is mechanically-actuated and can be identified
by a yellow lever on the control pedestal with the inscription GUST
LOCK. The mechanical gust lock actuates on the torque tube which is
attached to the control column.
To lock the elevator, the control column must be pushed and held fully
forward and the gust lock lever moved backwards from the FREE to
LOCKED position. Aside locking the elevators, it also restricts both
thrust levers to a minimum thrust above IDLE position.
To unlock the system, push the control column forward while the
safety lock device is lifted and the lever is moved forward from the
LOCKED to FREE position.
ELECTROMECHANICAL GUST LOCK SYSTEM
The electromechanical gust lock can be identified by a yellow and
black striped safety lock device on the control pedestal with the
inscription ELEC GUST LOCK, and by two indication lights on the
glareshield panel.
The electromechanical gust lock acts directly on the elevator panels,
preventing them from moving. Basically, the system is composed of
locking pins driven by an electromechanical actuator, which is
commanded by the gust lock lever. Gust lock system operation
(locking and unlocking) is possible on the ground only. Once airborne,
the system is deenergized to prevent gust lock lever movement and
inadvertent actuation.
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