27-11-00
ALL ú ú 03 Page 542 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
The control rod from the left CLCP to the right spoiler differential mechanism 1) With rig pin A/S-2 installed, adjust the control rod until
you can easily install rig pin A/S-5. 2) Tighten the checknuts on the control rod.The control rod between the autopilot actuator and the trim and feel mechanism 1) If you use the phase synchronous voltmeter, do the steps
that follow:
a) Connect the voltmeter to the autopilot actuator.
b) With rig pin A/S-2 installed, adjust the control rod
until the output voltage is 0.0 +/- 0.05 volts. c) Tighten the checknut on the control rod. d) Make sure the IN PHASE VOLTS reads 0.0 +/- 50 MV.
2) If you use the ground test for the transducer outputs (Ref 22-10-00/528), do the steps that follow: a) With rig pin A/S-2 installed, adjust the control rod
until the center "AILERON SURFACE POSITION" display
value is 0.1 degrees or less. b) Tighten the checknuts on the control rod. c) Make sure the center "AILERON SURFACE POSITION" display
value is 0.1 degrees or less.The control rods from the CLCPs to the aileron programmers 1) With rig pin A/S-2 installed, adjust the control rods until
you can easily install rig pins A/S-6 and A/S-7. 2) Tighten the checknuts on the control rods.The load limiter rod between the aileron programmers 1) With rig pins A/S-6 and A/S-7 installed, adjust the rod
length with the vernier adjustment until you can easily install the connecting bolt. 2) Make sure the vernier adjustment rod end and sleeve dimensions are not out of tolerance (Fig. 503, Detail A). 3) Install the bolts, nuts, washers, bushings, and cotter
pins. 4) Tighten the checknuts. 5) Install the lockwire.The load limiter rod between the right input quadrant and the right aileron programmer. 1) With rig pins A/S-2, A/S-7 and A/S-1 installed (A/S-1 is in
the load limiter drum Fig. 502), adjust the right body cable, with the tension in the limits shown in Fig. 501, until you can easily install the load limiter rod connecting bolt.
2) Make sure you do not preload the rod.
The rod between the right input quadrant and the left CLCP
(left autopilot) which is located in the right wheel well:
1) With rig pins A/S-2 and A/S-7 installed, adjust the rod
until you can easily install rig pin A/S-3. 2) Tighten the checknuts on the rod.
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27-11-00
ALL ú ú 03 Page 543 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
CAUTION: MAKE SURE TO REMOVE ALL OTHER RIG PINS BEFORE YOU REMOVE
_______ RIG PIN A/S-2. FAILURE TO REMOVE RIG PIN A/S-2 LAST CAN CAUSE DAMAGE TO THE CENTRAL LATERAL CONTROL PACKAGE.
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Remove rig pins A/S-1, A/S-3, A/S-4, A/S-5, A/S-6 and A/S-7.
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Remove rig pin A/S-2.
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Remove all the rig pins.
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Make sure all control rods are installed, checknuts tightened, and cotter pins and lockwire installed.
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Adjust Aileron Control Wing Cables AA and AB for Installation of Rig Pins when Installation of Rig Pin is not Easy, Cable Tension out of Tolerance, or Installation of a New Cable.
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Make sure the access panels (573BB, left wing, 673BB, right) are open on the wing trailing edge, forward of the aileron.
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