Embraer EMB145, Operation Manual

Page: 2001 / 2662

FLIGHT CONTROLS
AIRPLANE
OPERATIONS
MANUAL
2-13-10
Page
2
Code
01 REVISION 38
AOM
-145/
111
4
ELEVATOR
GENERAL
The primary pitch control system is performed by the elevators, which
are actuated through a fully duplicated set of command circuits.
JAMMED ELEVATOR
In case of jamming of one of the circuits (left or right), both elevator
panels may be disconnected through a handle located on the control
pedestal. This procedure will release the free elevator panel from its
jammed counterpart, allowing the free panel to be commanded.
When disconnected, an amber light illuminates on the control stand.
Controls cannot be reconnected during flight, requiring maintenance
action.
JAMMED ELEVATOR OPERATION
The autopilot elevator servo and the stick pusher servo are connected
on the left side of the disconnection device. Once disconnection is
actuated, the stick pusher will actuate only on the left side and
autopilot must not be used.
TABS
GENERAL
There are four tabs, two on each elevator panel, located near the
elevator root. The outer tabs are servo tabs and the inner tabs are
spring tabs.
SERVO TABS
The deflection of the servo tabs is proportional to the elevator
deflection. Since the servo tabs proportionally deflects in the opposite
direction to the elevators, it promotes a reduction in the forces
required.