Rudder Forward Quadrant Installation
Figure 503
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737-300/400/500MAINTENANCE MANUAL
S 215-014
(5)
Make sure the rudder is in the neutral position.
S 735-030
(6)
AIRPLANES WITH 10-60447 YAW DAMPER COUPLER;
Do the system test of the yaw damper (AMM 22-12-00/501).
S 735-029
(7)
AIRPLANES WITH 10-62253 YAW DAMPER COUPLER; Do the operational test of the yaw damper (AMM 22-12-01/501).
S 735-027
(8)
Do the test of the rudder hinge and the bearing play of the PCU (AMM 27-21-00/501).
S 735-028
(9)
Do the test of the rudder centering (AMM 27-21-00/501).
S 735-026
(10)
Do the test of the rudder hinge friction (AMM 27-21-00/501).
D.
Do the Functional Test
S 865-016
(1)
Move the FLT CONTROL B switch to OFF.
S 725-017
(2)
Measure the rudder travel:
(a)
Move the captain's left rudder pedal until the forward quadrant touches the stop.
(b)
Make sure the rudder travel is 21.82 |0.80 inches (Fig. 501).
(c)
Move the captain's right rudder pedal until the forward quadrant touches the stop.
(d)
Make sure the rudder travel is 21.82 |0.80 inches.
S 865-018
(3)
Move the FLT CONTROL A switch to OFF and the FLT CONTROL B switch to ON.
(4)
Measure the rudder travel again.
S 715-024
(5)
Do a test of the secondary slide in the dual servo valve of the rudder power control unit:
(a)
Supply hydraulic power systems A and B to the rudder system (AMM 27-21-00/201).
(b)
Slowly push the captain's left pedal forward until it touches the stop then release.
S 725-019
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737-300/400/500MAINTENANCE MANUAL
(c)
As fast as possible, push the captain's right pedal forward. 1) Make sure the right pedal move smoothly forward until it touches the stop.
2) If the right pedal moves in the opposite direction of the applied force, replace the rudder power control unit (AMM 27-21-91/401).
(d)
Release the right pedal.
(e)
Slowly push the captain's right pedal forward until it touches the stop then release.
(f)
As fast as possible, push the captain's left pedal forward. 1) Make sure the left pedal move smoothly forward until it touches the stop.
2) If the left pedal moves in the opposite direction of the applied force, replace the rudder power control unit (AMM 27-21-91/401).
(g)
Release the left pedal.
(h)
Slowly push the first officer's left pedal forward until it touches the stop then release.
(i)
As fast as possible, push the first officer's right pedal forward. 1) Make sure the right pedal move smoothly forward until it
touches the stop.
2) If the right pedal moves in the opposite direction of the applied force, replace the rudder power control unit (AMM 27-21-91/401).
(j)
Release the right pedal.
(k)
Slowly push the first officer's right pedal forward until it touches the stop then release.
(l)
As fast as possible, push the first officer's left pedal forward. 1) Make sure the left pedal move smoothly forward until it
touches the stop.
2) If the left pedal moves in the opposite direction of the applied force, replace the rudder power control unit (AMM 27-21-91/401).
(m)
Release the left pedal.
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