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 ~........................................................ | All of the other torque tubes on | | | the inboard flap drive system | 0.20 | 2...........................................…............1 ~........................................................ | The third torque tube outboard from | | | each side of the outboard power package | 0.70 | 2...........................................…............1
 NOTE: A minimum axial end play of 0.50 inch (1.3 cm) can be
____ satisfactory. It is satisfactory only if the coupling sleeves will not have tension loads. Also, the distance from the rolled end of the sleeve to the face of the sprocket must be 0.38 inch (0.97 cm) or more when the torque tube touches in the opposite direction.
 ~........................................................ | All of the other torque tubes on | | | the outboard flap drive system | 0.10 | 2...........................................…............1
 S 224-026
 (6)  
Make sure the torque tube is aligned, if you replaced the gearbox or idler (Section A-A, Fig. 401).

 (a)  
Align the torque tubes if it is necessary.

 S 224-047
 (7)  
Make sure that there is a gap between the torque tube and the tire burst bracket of 0.105 to 0.125 inch (0.267 to 0.318 cm).

 S 224-028

 (8)  
Make sure that there is least a 0.38 inch (0.97 cm) clearance between the torque tubes and all other structure and equipment.

 S 434-029

 (9)  
Install the bolts which attach the center bearing to the structure if it is necessary

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A
747-400 MAINTENANCE MANUAL
 S 434-030
 (10)
 Install the torque tube safety straps if it is necessary.

 S 644-031

 (11)
 Fill the coupling sleeves with grease, with a grease gun, until it flows out the adjacent lubrication holes.

 S 094-032

 (12)
 Remove the flap carriage locks.

 F.
Do a check of the torque tube.

 S 864-049
 (1)  
Do the T.E. flaps activation procedure (AMM 27-51-00/201).

 S 864-033

 (2)  
Pressurize hydraulic systems No. 1 and 4 (AMM 29-11-00/201).

 S 864-045
 WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES AND FLAP DRIVE MECHANISMS BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (3)  
Put the flap control lever in the 30-unit detent to extend the flaps.

 S 864-041

 (4)
Put the flap control lever in the UP detent to retract the flaps.

 S 714-035

 (5)  
Make sure that the torque tubes do not touch the structure during usual operation.

 G.
Put the Airplane Back To Its Usual Condition

 (1)
Put the flap control lever in the UP detent to retract the flaps.

 S 864-042

 (2)  
Release the pressure in hydraulic systems No. 1 and 4
 (Ref 29-11-00/201).

 

 S 864-037
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 ALL  ú ú 03 Page 413 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 094-038
 WARNING:_______ CAREFULLY DO THE SPECIFIED TASK TO REMOVE THE DOOR LOCKS FROM
 THE LANDING GEAR DOORS.  THE DOORS CAN CLOSE QUICKLY IF YOU DO
 NOT REMOVE THE DOOR LOCKS CORRECTLY.  THIS CAN CAUSE INJURY TO

 PERSONS AND DAMAGE TO EQUIPMENT.
 (3)  Remove the door locks from the doors for the body landing gear (Ref 32-00-30/201).
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