P I L O T T R A I N I N G G U I D E
AUTOMATIC FLIGHT CONTROL SYSTEM
2-42
For Training Purposes Only
Sept 04
•
Activation of TCS for greater than 1 second is considered an autopilot
disengagement
•
The autopilot is disengaged at anytime while in EDM
•
When the autopilot is disengaged, the FD modes remain the lateral and vertical
modes active at the time. The FD mode is HGD/FLC if the autopilot is disengaged
while in the descent and ASEL is not active, HDG/ASEL if the autopilot is
disengaged while transitioning from descent to level flight or HDG/ALT if the
autopilot is disengaged after capturing the selected altitude target
•
Autothrottle is automatically engaged upon initiation of the emergency descent
mode
•
Cancellation of the emergency descent mode does not disengage the autothrottles
•
Autothrottles are manually disengaged and reengaged while in EDM. The
autothrottles are not automatically reengaged if disengaged. Auto engagement
occurs only upon initiation of the emergency descent mode
•
The EMERGENCY DESCENT CAS message is recorded by the FDR when
posted
AUTOPILOT – FLIGHT DIRECTOR EICAS MESSAGES
789
1 . 65
GX_02_044
AP PITCH TRIM FAIL
AP TRIM IS NU
AP TRIM IS ND
AP TRIM IS LWD
AP TRIM IS RWD
AFCS ENGAGE INVAL
YD 1 FAIL
YD 2 FAIL
YD OFF
YD 1-2 FAIL
AP PITCH TRIM FAIL
Indicates that autopilot
pitch trim is inoperative.
AP TRIM IS NU-ND
Indicates that autopilot
pitch mistrim monitor
detects excessive forces.
AP TRIM LWD-RWD
Indicates that autopilot roll
mistrim monitor detects
excessive forces.
YD OFF
Indicates that fault warning
computer detects that no
yaw damper is engaged.
AFCS ENGAGE INVAL
Indicates that fault warning
computer detects invalid
autopilot engagement.
YD 1 (2) FAIL
Indicates that yaw
damper 1 (2) has failed.
YD 1-2 FAIL
Indicates that both
yaw dampers
failed
have