(h)
Tighten small nuts to 12-15 pound-inches.
(i)
Make sure the valve lever on each power control unit is at the center between the stops (Fig. 401). 1) If it is necessary, do this task to adjust the input rods:
"Aileron and Aileron Trim Control System Adjustment" (Ref 27-11-00/501).
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27-11-81
ALL ú ú 01.1 Page 405 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CAUTION:_______ MAKE SURE THAT YOU INSTALL THE AILERON POSITION SENSOR ROD CORRECTLY. AN INCORRECT INSTALLATION OF THE ROD CAN CAUSE DAMAGE TO EQUIPMENT WHEN YOU ENGAGE THE AUTOPILOT.
ú (j) (k) (l) (m) (n) (o) Connect the autopilot aileron position sensor rod to the top input lever of the power control shaft with the nuts, washers, and bolts (AMM 22-11-29/501).Connect the autopilot actuator rod to the top input lever of the power control shaft with the nuts, washers, and bolts.Install the bolt assemblies, washers, nuts, and cotter pins to connect the top and bottom reaction links to the reaction support assemblies.Tighten the large nuts to 300-350 pound-inches.Tighten the small nut to 170-200 pound-inches.Connect the electrical connector to the trim actuator.
(3) S 864-009Make sure the rig pin A/S-15 goes through the two walls of the centering and trim mechanism.
(4) S 094-010Remove the rig pin A/S-4.
(5) S 824-011Do this task: "Aileron Artificial Feel, Centering and Trim Mechanism Adjustment Test" (Ref 27-11-81/501).
(6) S 824-012Do this task: "Aileron Position Sensor Adjustment Test" (AMM 22-11-29/501).
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27-11-81
ALL ú ú 01.1 Page 406 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
AILERON ARTIFICIAL FEEL, CENTERING AND TRIM MECHANISM - ADJUSTMENT/TEST
_______________________________________________________________________
1. General_______
A. This procedure contains a task to adjust the aileron artificial feel, centering and trim mechanism.
TASK 27-11-81-805-018
2. Aileron Artificial Feel, Centering and Trim Mechanism Adjustment________________________________________________________________
A. References
(1)
27-11-00/201, Aileron and Aileron Trim Control System
(2)
27-11-00/501, Aileron and Aileron Trim Control System
(3)
AMM 22-11-25/501, Autopilot Aileron Actuator
(4)
AMM 22-11-29/501, Aileron Position Sensor
B.
Access
(1)
Location Zone
101 Control Cabin, LH
102 Control Cabin, RH
216 Main Wheel Well, LH
217 Main Wheel Well, RH
C.
Adjust the Aileron Artificial Feel, Centering and Trim Mechanism
S 865-002
(1)
Release the tension on the centering spring to remove the artificial feel input forces.
S 865-001
(2)
Do this task to pressurize hydraulic systems A and B: "Aileron Hydraulic Systems A and B Pressurization" (Ref 27-11-00/201).
S 825-003
(3)
Adjust the centering and trim mechanism:
(a)
Make sure that the captain's and the first officer's control wheels are in the neutral position.
(b)
Apply a tangent force to the captain's control wheel at 6.5-inch radius. 1) Make sure the force is not more than 2.0 pounds or 13
pound-inches torque.
(c)
Tighten the centering springs equally at the eyebolts to get the artificial feel input forces.
(d)
Write down the artificial feel input forces.
(e)
Measure the force necessary to turn the captain's control wheel 2 degrees clockwise and counterclockwise from the neutral position.
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