KLM MD-11 - Horizontal Stabilizer Trim

MD-11 Flight Crew Operations Manual
k
Flight Controls -
Controls and Displays
Flt.30.9
Horizontal Stabilizer Trim
1. LONG TRIM Handles
The handles provide direct mechanical control of the horizontal stabilizer
control valves. The trim handles have the same function as the electric control
wheel trim switches, except that they have override authority over LSAS or
autopilot inputs except in DUAL or SINGLE LAND mode.
Moving the handles together provides control of the horizontal stabilizer.
Stabilizer movement rate is determined by airspeed and altitude. Both
handles must be operated together to move the horizontal stabilizer.
2. Control Wheel Trim Switches (Capt & F/O)
Stabilizer motion is electrically controlled by dual trim switches on each
control wheel. Actuation of the switches engages both horizontal stabilizer
trim motors. Both switches on the respective control wheel must be operated
simultaneously and in the same direction. Stabilizer motion rate is determined
by airspeed and altitude.
Operation of these switches will disengage AP except in DUAL or SINGLE
LAND mode and interupt LSAS operation.
DB1-2-1739
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CONTROL WHEELFORWARD PEDESTAL, LEFT SIDE
2
October 02, 2006