S 866-186
 (12)
 Turn the control wheel counterclockwise 60 to 70 degrees.

 S 976-187

 (13)
 Let the flow become stable for one minute and write this flow as

 flow No. 9. Flow No. 9__________GPM
 S 866-188
 (14)
 Put the control wheel in the neutral position.

 S 976-189

 (15)
 Subtract flow No. 9 from flow No. 7 and write this flow as flow

 No. 9A. Flow No. 7__________GPM Flow No. 9__________GPM
 Flow No. 9A__________GPM
 NOTE: Flow No. 9A is the null leakage of the power packages for
____ the left inboard aileron and the right outboard aileron.
 S 976-190
 (16) Subtract flow No. 8A from flow No. 9A and write this flow as flow
 No. 9B. Flow No. 9A__________GPM Flow No. 8A__________GPM Flow No. 9B__________GPM
 NOTE: Flow No. 9B is the null leakage of the power package for the
____ right outboard aileron.
 NOTE: If flow No. 9A is approximately equal to flow No. 6A, it is
____ not necessary to continue the lateral hydraulic control system - internal leakage check.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-00
 ALL  ú ú 01 Page 654 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 866-192
 (17)
 Turn the control wheel clockwise 30 to 40 degrees.

 S 976-193

 (18)
 Let the flow become stable for one minute and write this flow as

 flow No. 10. Flow No. 10__________GPM
 S 866-194
 (19)
 Put the speedbrake lever in the full aft position.

 S 866-446

 (20)
 Turn the control wheel to a position 30 to 40 degrees counterclockwise of the neutral position.

 S 976-195

 (21)
 Let the flow become stable for one minute and write this flow as

 flow No. 11. Flow No. 11__________GPM
 S 976-196
 (22) Subtract flow No. 11 from flow No. 10 and write this flow as flow No. 11A.
 Flow No. 10__________GPM
 Flow No. 11__________GPM
 Flow No. 11A__________GPM
 NOTE:____ Flow No. 11A is the internal leakage for other than the
 null leakage of the control valves in spoiler packages 1 and
 4.

 S 866-197
 (23)
 Turn the control wheel 30 to 40 degrees clockwise.

 S 976-198

 (24)
 Let the flow become stable for one minute and write this flow as

 flow No. 12. Flow No. 12__________GPM
 S 866-199
 (25)
 Put the control wheel in the neutral position.

 S 866-447

 (26)
 Put the speedbrake lever in the full foward position.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-00
 ALL  ú ú 01 Page 655 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 976-200
 (27) Subtract flow No. 12 from flow No. 7 and write this flow as flow No. 12A.
 Flow No. 7__________GPM
 Flow No. 12__________GPM
 Flow No. 12A__________GPM
 NOTE:____ Flow No. 12 is the internal leakage other than the null
 leakage of the control valves in spoiler packages 9 and 12.

 S 866-201
 (28)
 Turn the control wheel 75 to 78 degrees clockwise.

 S 976-202

 (29)
 Let the flow become stable for one minute and write this flow as

 flow No. 13. Flow No. 13__________GPM
 S 866-203
 (30)
 Turn the control wheel fully clockwise.

 S 976-204

 (31)
 Let the flow become stable for one minute and write this flow as

 flow No. 14. Flow No. 14__________GPM
 S 866-205
 (32)
 Put the control wheel in the neutral position.

 S 976-206

 (33)
 Subtract flow No. 14 from flow No. 13 and write this flow as flow
　
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