MD-11 Flight Crew Operations Manual
k
Automatic Flight -
Description and Operation
Auto.10.4
Go-Around (GA) Switch
The GA switch is on the center throttle. Pushing the switch in flight below 2,500
feet AGL with flaps down or slats extended engages the FD go-around mode. If
the AP is on, it will follow the FD commands. If a windshear is detected while on
approach, pushing this switch engages AP/FD windshear guidance.
FLT DIR and FLT DIR OFF Switches
The FLT DIR and the FLT DIR OFF switches are on the Captain's and First
Officer's source input select panels. The FLT DIR switches allow FD1 commands
to appear on the First Officer's PFD or FD2 commands to appear on the Captain's
PFD. The FLT DIR OFF switches allow the FDs to be selected off.
Automatic Flight System (AFS) Panel
The AFS control panel, on the forward overhead panel, is used for manual inputs
to the flap limiter and elevator feel. It is also used to turn on or off yaw damper
and LSAS control channels. Refer to the Flight Controls chapter for a description
of yaw damper, LSAS, flap limiter, elevator feel, and the AFS control panel.
EIS Control Panels (ECP)
The ECPs are on the GCP, one at each outboard end. These panels control the
operation of the Captain's and First Officer's PFD and navigation displays (ND).
Roll Control Wheel Steering (CWS)
The AFS roll CWS provides lateral stability through electronic control of a single
inboard aileron when the AP is not engaged.
With no force on the control wheel, the aircraft holds the current roll attitude.
Forces on the control wheel command an aircraft roll rate proportional to the
applied force, so that when the force is removed from the control wheel, the
aircraft holds the new roll attitude.
Attempts to achieve bank angles in excess of 30 degrees require increasing pilot
override force on the control wheel proportional to the amount of the bank above
30 degrees. If the pilot releases that override force, the aircraft will immediately
roll back to, and hold 30 degrees of bank.
CWS is available when either FCC is operational and at least one yaw damper
channel is active.
Pulling down both of the AFS OVRD OFF switches on the FCP disengages the
roll CWS (as well as the AP and ATS systems).
October 02, 2006
To Next Page