(b)
Disconnect D1827 (A SYSTEM) and D1691 (B SYSTEM) connectors from the actuators.
(c)
Connect a -110 test cable from J-1 on the test set to the actuator A.
(d)
Connect a -110 test cable from J-2 on the test set to the actuator B.
(e)
Connect the voltmeter (VTVM) to the LVDT FEEDBACK - A J10A and J11A on the test set.
(f)
Set the switches on the test set as follow (A systenm): 1) LVDT FEEDBACK switches A ON, B ON. 2) LVDT EXCITATION switches A ON, B ON. 3) NSS EXCITATION switches A OFF, B OFF. 4) SOLENOID EXCITATION (PISTON and ENGAGE) switches A ON, B
ON. 5) NSS FEEDBACK switches A OFF, B OFF. 6) CURRENT SELECT switch to A T-VALVE. 7) SOLENOIDS ON/OFF (CENTER SWITCH) - ON. 8) A & B SOLENOIDS switches to A NORM, B NORM. 9) ACTUATOR SELECT switch to A and B INDEPENDENT
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737-300/400/500MAINTENANCE MANUAL
10) POWER switch to ON.
NOTE:____Lights A and B must be ON. NSS light must be OFF.
S 865-065
(13) Put the actuators to the null position:
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(a)
Set the hydraulic A and B switches on the P5 panel to the ON position.
(b)
Turn the A POSITION CONTROL switch on the test set until the meter is at the lowest value.
(c)
Make sure that the voltage across J10A and J11A is less than
0.080 volts.
(d)
Lock the A POSITION CONTROL switch in its position.
(e)
Disconnect the VTVM.
(f)
Connect the voltmeter (VTVM) to the LVDT FEEDBACK - B J10B and J11B on the test set.
(g)
Turn the B POSITION CONTROL switch on the test set until the meter is at the lowest value.
(h)
Make sure that the voltage across J10B and J11B is less than
0.080 volts.
(i)
Lock the B POSITION CONTROL switch in its position. Make sure that there is no movement at the actuator levers.
S 215-010
(14) Do a check on the shear rivets of the actuator levers:
(a)
Examine the shear rivet areas.
(b)
Make sure that there is no movement in these areas.
(c)
If there is a movement, remove the actuator lever and replace the shear rivets (OHM 27-09-05).
S 435-011
(15) Install the rod assembly between the two actuator levers:
(a)
Adjust the rod assembly length until the bolt can go smoothly through the rod end and actuator lever.
(b)
Make sure that you can see the bearing threads of the rod end through the inspection hole in the rod assembly. Adjust the rod assembly if it is necessary.
NOTE: The nominal length of the rod assembly is 8.00
____
inches.
(c) Tighten the locknut on the rod end.
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(d) Install the bolt, washer, and nut.
NOTE: The bolt must go smoothly through the rod end and
____
actuator lever.
S 865-012
(16)
Move the pilot's control wheel lightly near the neutral position to
make sure that the system is in the center. Make sure that the
index mark at the inboard end of the right aileron is aligned.
S 435-013
(17)
Install the rod assembly between the actuator A lever and PCU input lever:
(a)
Adjust the rod assembly length until the bolt can go smoothly through the rod end and actuator A lever.
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