(c)
Install rudder pedal force checking tool on captain's right rudder pedal (Fig. 507). Push on tool handle. At point where rudders start to move, check compression gauge to see that maximum force is 18.0 pounds.
NOTE: When using rudder pedal force checking tool, multiply compression gauge reading by multiplication factor from Table.
(d)
Repeat step (c) with captain's left pedal.
(e)
Push on tool handle until captain's left pedal is 3.60 ±0.10 inches forward from
neutral and measure force.
a) Check that maximum force is 82 pounds.
b) Check that minimum force is 51 pounds.
(f)
Install rudder pedal force checking tool on captain's right pedal. Push on tool handle
until captain's left pedal is 3.60 ±0.10 inches forward from neutral and measure force. a) Check that maximum force is 82 pounds. b) Check that minimum force is 51 pounds.
(g)
Repeat steps (e) and (f) for first officer's pedals.
(6)
Test rudder travel.
(a)
Set rudder trim control knob to neutral.
(b)
Provide rudder systems A and B hydraulic power. Refer to 27-21-0. Position flight control switch B to OFF, leave flight control switch A in ON position.
(c)
Move captain's left pedal until forward quadrant stop is contacted. Measure rudder travel. Check that movement is 21.82 ±0.80 inches.
(d)
Move captain's right pedal until forward quadrant stop is contacted. Measure rudder travel. Check that movement is 21.82 ±0.80 inches.
(e)
Repeat steps (c) and (d) under following conditions: 1) Flight control switch A OFF and flight control switch B ON. 2) Flight control switch A OFF and flight control switch B in STDBY RUD position.
(7)
Test rudder trim friction and travel.
(a)
Provide rudder systems A and B hydraulic power (Ref 27-21-0).
(b)
Use rudder trim knob torque adapter to rotate trim control knob from neutral to full right, and from full right to neutral. Then from neutral to full left and return. Maximum force required shall be 28 pound-inches as measured on trim control knob.
(c)
Rotate trim conrol knob from neutral in each direction to stop. Measure knob travel. The total rotation in both directions shall be 4 turns +130士22 degrees.
(d)
Rotate trim control knob in both directions until indicator is at 10. Check that rudder travel is 10.22士0.50 inches in each direction from neutral.
(8)
Test Standby Rudder Actuator Deadband
(a)
Provide rudder systems A and B hydraulic power (Ref 27-21-0).
(b)
Check that trim is at neutral.
(c)
Check that rudder is at neutral.
(d)
Position flight control switches A and B to OFF, then position flight control switch B to STDBY RUD.
(e)
By hand push hard on rudder to the right, then slowly ease off load.
(f)
With hands off rudder, measure rudder position right.
(g)
By hand push hard on rudder to the left, then slowly ease off load.
(h)
With hands off rudder, measure rudder position left.
(i)
Calculate difference between (f) and (h). If difference is greater than 0.2 inch, the standby actuator must be adjusted again.
(j)
Position flight control switches A and B to ON.
(9)
Do a test of the secondary slide in the dual servo valve of the rudder power control unit:
(a)
Supply the rudder hydraulic power systems A and B (Ref 27-21-0/201).
(b)
Slowly push the captain's left pedal forward until it touches the stop then release.
(c)
As fast as possible, push the captain's right pedal forward. The right pedal should move smoothly forward until it touches the stop. 1) If the right pedal moves in the opposite direction of the applied force, replace the
