MD-11 Flight Crew Operations Manual
k
Flight Controls -
Description and Operation
Flt.10.7
• Position transmitters in the left and right inboard flap drive systems
provide position control signals that will display on the SD a 4 degree
inboard flap angle disagreement. The signals are also used by the
autothrottle and flight recorder systems.
• A FLAP/SLAT handle transmitter under the pedestal compares
commanded handle position with the outboard flap position transmitters.
If the signals disagree by 4 degrees or more, an indication appears on the
SD. The flight crew must lift the FLAP/SLAT handle and then position
the handle in one of the takeoff detents.
Flaps may not extend into the landing range when operating on emergency power
only.
Flaps position may be selected using the dial-a-flap system, a moveable detent for
flaps settings. The detent is selected by rotating the dial-a-flap thumbwheel until
the required detent flap setting appears in the FLAP T.O. SEL window. Fifteen
non-linear divisions are displayed in the window. These divisions represent detent
settings between 10 degrees and 25 degrees of flap deflection. Rotation of the
thumbwheel drives the indicator and positions the detent. A moveable detent for
takeoff allows setting the flaps at the position which would provide best takeoff
performance for a given set of field conditions
To set takeoff flaps and slats, the flight crew rotates the thumbwheel until the
proper takeoff flap setting is displayed in the FLAP T.O. SEL window. The flight
crew then lifts the FLAP/SLAT handle out of the 0 degree detent and pulls aft until
the handle latches in the detent.
To retract takeoff flaps and slats, the flight crew grasps the FLAP/SLAT handle
and lifts up while moving the handle forward. When the 0 degree detent is
reached, the handle is pushed down and forward until the handle reaches the
retract position.
To extend landing flaps and slats when in the UP/retract detent, the flight crew
lifts the FLAP/SLAT handle up and aft past the go-around gate to either the 35
degree or 50 degree landing detent.
To retract landing flaps and slats, the flight crew lifts the FLAP/SLAT handle out
of the detent and moves it forward, pushing down and then up to pass the
go-around gate. When the 0 degree detent is reached, the flight crew pushes down
and forward to the retract position. For electric slats (see next page) the handle has
to be lifted over a gate and pushed forward to the UP/RET detent for slat
retraction.
The flaps can be operated without the slats. With the FLAP/SLAT handle in the
UP/retract position, the flight crew pushes forward on the SLAT STOW lever
while lifting the FLAP/SLAT handle up and aft to the desired flap position. To
reengage slats, flight crew returns the handle to the UP/retract position.
October 02, 2006
To Next Page
Loading...