MD Helicopters MD Explorer - Page 1803

CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 607
Revision 36
67-10-00
F. Rotor Flight Controls Travel Check
(Ref. Figure 602)
Special Tools
(Ref. CSP−SPM)
Item Nomenclature
T2001 Hydraulic Mule
T2002 Ground Power Unit
Moving Flight Controls
 If servoactuator input lever does not over
travel when servoactuator is at full inter
nal stops, damage to flight controls or an
out of rig condition can be the possible
cause.
 Do a complete inspection of bellcranks,
brackets, control rods, and structure
where brackets are attached.
 Do not move rotor flight controls through
their full range unless hydraulic power is
supplied to the helicopter.
 Cyclic stick must be centered before you
move collective control through its full
range of travel.
 Collective control must be set at approxi
mately 80% before you move cyclic control
through its full range of travel.
NOTE: Overtravel is indicated when servoac
tuator input lever stop bushing has moved
from its center position with servoactuator
against its travel stop.
(1). Remove swashplate forward fairing
(T155) (ref. Section 53-30-00).
(2). Apply 1000 psig (6894.8 kPa) hydrau
lic pressure to Hydraulic System
Number 1 with hydraulic mule (T2001)
(ref. Section 29-00-00).
(3). Apply external electrical power with
ground power unit (T2002) (ref.
CSP-900RMM-3).
(4). Put cyclic stick (31) in center position.
(5). Pull collective friction release switch
(12).
(a). Lower collective stick (8) to down
stop.
(b). Release switch.
(6). Make sure collective servoactuator
input lever (4) is overtraveled in the
retracted direction.
(7). Pull collective friction release switch
(12).
(a). Raise collective stick (8) to the full up
position.
(b). Release switch.
(8). Make sure collective servoactuator
input lever (4) is overtraveled in the
extended direction.
(9). Pull collective friction release switch
(12).
(a). Raise collective stick (8) to approxi
mately 80% as shown on the IIDS.
(b). Release switch.
(10). Use the trim switch (32) to move the
cyclic stick (31) to the full forward
position.
(11). Make sure longitudinal servoactuator
input lever (4) is overtraveled in the
retracted direction.
(12). Use the trim switch (32) to move the
cyclic stick (31) to the full aft position.
(13). Make sure longitudinal servoactuator
input lever (4) is overtraveled in the
extended direction.
(14). Put cyclic stick (31) in center position.
(15). Use the trim switch (32) to move the
cyclic stick (31) to the full right posi
tion.
(16). Make sure lateral servoactuator input
lever (4) is overtraveled in the retracted
direction.
(17). Use the trim switch (32) to move the
cyclic stick (31) to the full left position.
(18). Make sure lateral servoactuator input
lever (4) is overtraveled in the extended
direction.
(19). Put cyclic stick (31) in center position.
(20). Pull collective friction release switch
(12).
(a). Lower the collective stick (8) to the
down stop.
CAUTION