S 866-168
(11)
Put the system No. 3 TAIL FLT CONTROL SHUTOFF switch in the ON position.
(12)
Put the control column in the full forward position.
S 866-169
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747-400 MAINTENANCE MANUAL
S 976-170
(13) Let this flow become stable for 1 minute and write this flow as flow
No. 5. Flow No. 5__________GPM
S 866-171
(14)
Put the control column in the neutral position.
S 976-172
(15)
Subtract flow No. 5 from flow No. 1 and write this flow as flow
No. 5A. Flow No. 1__________GPM Flow No. 5__________GPM
Flow No. 5A__________GPM
NOTE: Flow No. 5A is the null leakage of the power package for the
____
right inboard elevator.
S 976-173
(16) Subtract flow No. 5A from flow No. 4A and write this flow as flow
No. 5B. Flow No. 4A__________GPM Flow No. 5A__________GPM Flow No. 5B__________GPM
NOTE: Flow No. 5B is the null leakage of the control package for
____
the upper rudder.
I. Lateral Hydraulic Control System - Internal Leakage Check
S 866-174
(1)
Put the system No. 3 WING FLT CONTROL SHUTOFF switch in the OFF position.
S 976-175
(2)
Let this flow become stable for 1 minute and write this flow as flow
No. 6. Flow No. 6__________GPM
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 976-176
(3) Subtract flow No. 6 from flow No. 1 and write this flow as flow
No. 6A. Flow No. 1__________GPM Flow No. 6__________GPM
Flow No. 6A__________GPM
NOTE: Flow No. 6A is the null leakage of these controls:
____
-
the right central-lateral control package.
-
the power package for left inboard aileron.
-
the power package for the right outboard aileron.
-internal leakage other than the null leakage of the control valves in spoiler packages 1, 4, 9, and 12.
S 866-177
(4)
Put the system No. 3 WING FLT CONTROL SHUTOFF switch in the ON position.
S 486-178
(5)
Install the control wheel adapter and protractor.
S 866-179
(6)
Turn the control wheel counterclockwise 30 to 40 degrees.
S 976-180
(7)
Let the flow become stable for one minute and write this flow as
flow No. 7. Flow No. 7__________GPM
S 866-181
(8)
Turn the control wheel to a position 60 to 70 degrees counterclockwise of neutral.
S 976-182
(9)
Let the flow become stable for one minute and write this flow as
flow No. 8. Flow No. 8__________GPM
S 866-183
(10) Put the control wheel in the neutral position.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
29-11-00
ALL ú ú 01 Page 653 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 976-184
(11) Subtract flow No. 8 from flow No. 7 and write this flow as flow No. 8A.
Flow No. 7__________GPM
Flow No. 8__________GPM
Flow No. 8A__________GPM
NOTE:____ Flow No. 8A is the null leakage of the power package for the
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