(d)
Mount dial indicator at lower end of rudder trailing edge.
(e)
Use rudder loading block to apply a force of 12 ±4 pounds to left and release slowly.
CAUTION: WHEN MOVING RUDDER SURFACE BY EXTERNAL FORCE, ALWAYS USE LOADING BLOCK TO PREVENT DAMAGE TO RUDDER. APPLY EXTERNAL FORCE APPROXIMATELY 46.9 INCHES FROM RUDDER HINGE LINE BETWEEN RUDDER STATIONS 13.33 and 31.65. DO NOT EXCEED A LOAD OF 50 POUNDS ON RUDDER AT ANY TIME.
(f)
Record rudder position on dial indicator.
(g)
Move rudder right with loading block using force of 12 ±4 pounds and release slowly.
(h)
Record rudder position on dial indicator.
(i)
Distance between rudder positions in steps (f) and (h) shall not exceed 0.04 inch.
(j)
Move rudder left with loading block using force of 12 ±4 pounds and release slowly.
(k)
Read rudder position on dial indicator. Rudder position shall be within 0.02 inch of step (f).
(l)
If difference between rudder positions recorded in steps (f) and (h) is greater than
0.04 inch, rudder hinge bearings and/or power control unit bearings have too much play. Correct this condition and repeat test.
(3)
Disconnect pushrod to nose wheel steering (Fig. 503).
(4)
Test rudder centering.
(a)
Provide rudder systems A and B hydraulic power (AMM 27-21-0/201).
(b)
Move captain's left rudder pedal approximately 0.5 inch forward and release. Rudder shall return to neutral position.
NOTE: Neutral position is defined as position at which both sides of rudder trailing edge are within width of tab on rudder index plate.
(c)
Move captain's right rudder pedal approximately 0.5 inch forward and release. Rudder shall return to neutral position.
(d)
Set FLT CONTROL switches A and B to OFF, then set either FLT CONTROL switch A or B to STDBY RUD.
(e)
Move captain's left rudder pedal approximately 1 inch forward and release. Rudder shall return to within 1.25 inches from index.
(f)
Move captain's right rudder pedal approximately 1 inch forward and release. Rudder shall return to within 1.25 inches from index.
(g)
Set FLT CONTROL switches A and B to ON.
(5)
Test rudder pedal forces.
(a)
Provide rudder systems A and B hydraulic power (AMM 27-21-0/201).
(b)
With rudder pedals in neutral, set captain's and first officer's pedal adjustment to midposition.
(c)
Install rudder pedal force checking tool on captain's right rudder pedal (Fig. 506). 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 60 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 60 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 (AMM 27-21-0/201).
(c)
Set FLT CONTROL switch A to ON and B to OFF positions.
(d)
Move captain's left pedal until forward quadrant stop is contacted.
1) Measure rudder travel.
2) Make sure that movement is 21.82 ±0.80 inches.
(e)
Move captain's right pedal until forward quadrant stop is contacted.
1) Measure rudder travel.
2) Make sure that movement is 21.82 ±0.80 inches.
(f)
Set FLT CONTROL switch A to OFF and B to ON positions.
1) Perform steps (d) and (e) above.
(g)
Set FLT CONTROL switch B to STDBY RUD position.
1) Perform steps (d) and (e) above.
(h)
Set FLT CONTROL switches A and B to ON positions.
(7)
Test rudder trim friction and travel.
(a)
Provide rudder systems A and B hydraulic power (AMM 27-21-0/201).
(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. 1) Make sure that the force is less than 28 pound-inches as measured on trim
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