CABLE AB
STRAIGHTEDGE
CABLE AB
CABLE AA CABLE AB CAPTAIN'S CONTROL WHEEL WHEEL FIRST OFFICER'S CONTROL
Figure 202 Aileron Trim and Feel Mechanism Adjustment
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27-11-06
ALL ú ú 01 Page 205 ú Oct 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
D. Prepare for Removal
S 492-002
(1) Make sure the ground locks are installed on the landing gear.
S 492-003
WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Do this task: "Installation of the Door Locks on the Wing Landing Gear" (Ref 32-00-30/201).
S 862-004
(3)
Do this task: "Hydraulic System Pressurization" (Ref 29-11-00/201).
S 862-005
(4)
Do this task: "Supply Electrical Power" (Ref 24-22-00/201).
S 832-060
(5)
Set the aileron trim system at the center to keep the aileron at the neutral position (Fig. 201):
(a)
Move the captain's and first officer's control wheels to the neutral position.
(b)
Operate the trim system switches until you can easily install rig pin A/S-2.
NOTE: For small increments of travel, you have to try more
____ than one time to get the trim system at the center.
S 492-007
(6) With a clamp, attach the control wheel straightedge across the thumbrests on the captain's and first officer's control wheels (Fig. 202).
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27-11-06
ALL ú ú 03 Page 206 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 862-008
(7)
Do this task: "Electrical Power Removal" (Ref 24-22-00/201).
S 862-009
(8)
Open this circuit breaker and attach the DO-NOT-CLOSE tag:
(a)
P7 Overhead Circuit Breaker Panel
1) 7D17 AILERON TRIM
S 482-010
(9)
Install a protractor and an adapter on the captain's control wheel.
S 822-053
(10)
Adjust the protractor to zero.
S 012-011
(11)
Get access to the aileron trim actuator through the opening of the body gear wheel well.
E.
Procedure
S 022-012
(1)
Remove the aileron trim actuator (Fig. 201).
(a)
Disconnect the electrical connector DM254 (22) from the aileron trim actuator (16).
(b)
Disconnect the actuator output shaft (13) from the trim and feel mechanism.
(c)
Remove the bolt (17) that attaches the actuator (16) to the rigging beam bracket (21).
(d)
Remove the aileron trim actuator (16).
(e)
Disconnect the electrical ground strap (23).
(f)
Move the captain's and first officer's control wheels to the neutral position.
(g)
Make sure you can easily install rig pin A/S-2.
TASK 27-11-06-402-013
3. Aileron Trim Actuator Installation__________________________________
A. Special Tools and Equipment
(1)
G12001-50 Rig Pin Kit
(2)
MIT65B04001-41 Control Wheel Straightedge
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