29-11-00
 ALL  ú ú 01 Page 668 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 976-259
 (11) Let the flow become stable for one minute and write this flow as
 flow No. 8. Flow No. 8__________GPM
 S 866-260
 (12)
 Turn the control wheel to the neutral position.

 S 976-261

 (13)
 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 for the power package of the
 right inboard aileron.

 S 866-264
 (14)
 With the speedbrake lever in the flight detent, turn the control wheel 55 to 65 degrees clockwise.

 S 976-265

 (15)
 Let the flow become stable for one minute and write this flow as

 flow No. 9. Flow No. 9__________GPM
 S 866-266
 (16)
 Turn the control wheel to the neutral position.

 S 976-267

 (17)
 Subtract flow No. 9 from flow No. 8 and write this flow as flow

 No. 9A. Flow No. 8__________GPM Flow No. 9__________GPM
 Flow No. 9A__________GPM
 NOTE: Flow No. 9A is the null leakage of the power package for
____ the right outboard aileron.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-00
 ALL  ú ú 01 Page 669 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 976-268
 (18) Subtract flow No. 9 from flow No. 7 and write this flow as flow No. 9B.
 Flow No. 7__________GPM
 Flow No. 9__________GPM
 Flow No. 9B__________GPM
 NOTE:____ Flow No. 9B is the null leakage of the power packages for
 the right inboard and outboard ailerons.
 NOTE:____ If flow No. 9B is approximately equal to flow No. 6A, it is
 not necessary to continue the lateral hydraulic control
 system - internal leakage check.

 S 866-271
 (19)
 Put the speedbrake lever in the full forward position.

 S 866-462

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

 S 976-272

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

 flow No. 10. Flow No. 10__________GPM
 S 866-273
 (22)
 Put the speedbrake lever in the full aft position.

 S 866-463

 (23)
 Put the control wheel in a position 30 to 40 degrees counterclockwise of neutral.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 29-11-00
 ALL  ú ú 01 Page 670 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 S 866-274
 (24) Let the flow become stable for one minute and write this flow as
 flow No. 11. Flow No. 11__________GPM
 S 866-275
 (25)
 Put the control wheel in the neutral position.

 S 976-276

 (26)
 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 other than the null
 leakage of the control valve for spoiler package No. 5.

 S 866-277
 (27)
 Put the speedbrake lever in the full forward position.

 S 866-464

 (28)
 Put the control wheel in a position 30 to 40 degrees counterclockwise of neutral.