S 864-032

 (6)  
Open these circuit breakers and attach a DO-NOT-CLOSE tag:

 (a)  
On the Main Power Distribution Panel, P6:
 1) 6E1, PRI TE FLAP CONT AC
 2) 6E2, PRI TE FLAP CONT DC

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747-400 MAINTENANCE MANUAL
 3) 6L19, TE FLAP ELEC CONT OTBD
 4) 6L20, TE FLAP LEC CONT INBD
 (b)  On the Right Power Distribution Center, P415: 1) 415A32, TE FLAP ELEC INBD 2) 415M38, TE FLAP ELEC OTBD
 S 864-033
 WARNING:_______DO NOT MOVE THE ALTN FLAPS EXT/RET SWITCH. IF YOU MOVE THE SWITCH, THE FLAPS CAN MOVE. THIS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (7)  Manually turn the torque tubes in the extend direction until the downstops on the inboard flap ballscrews touch (approximately 3 turns).
 NOTE: use the strap wrench to control the motion of the torque
____
 tubes.

 (a)  Make sure that at least one ballscrew downstop on each side touches. If no ballscrew downstops on one side touch, measure and record this gap as the 'Y' dimension of the ballscrews.
 S 094-044
 (8)  
Remove the strap wrench.

 E.
Remove the No-Coast Drag Brake

 S 034-035
 (1)
Disconnect the torque tube from the no-coast drag brake (Fig. 402):

 (a)  
Remove the three screws (7) that attach the coupling sleeve to the torque tube on the two sides of the drag brake (1).

 (b)  
Move the torque tubes away from the drag brake.

 NOTE:____Do not turn the torque tubes. If you turn the torque tubes, it will be necessary to do the flap system adjustment.
 S 024-036
 (2)  
Remove the no-coast drag brake:

 (a)  
Remove the two bolts (2), washers (6), and nuts (5).

 (b)  
Remove the drag brake from the airplane.

 (c)  
Remove the support (4) and the safety strap (3).

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 TASK 27-51-42-404-013
 4. No-Coast Drag Brake Installation (Recommended Procedure)
________________________________________________________
 A. Special Tools and Equipment
 (1)  
24ME65B00116, Inboard TE Flap Lock (4 necessary)

 B.
Consumable Materials

 (1)  
A00490, Sealant

 C.
Parts

 ~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ |402 | 1 |Brake Assy-Drive Sys No Coast Drag | 27-51-60 | 01 | 737 | | | 2 |Bolt | | | 728 | | | 3 |Strap - Safety | | | 716 | | | 4 |Support | | | 740 | | | 5 |Nut | | | 734 | | | 6 |Washer | | | 731 | | | 7 |Screw | 27-51-20 | 01 | 10 | 2......…........…...................................…..........….....….........1
 D. References
 (1)  
AMM 27-51-00/501, Trailing Edge Flap Drive System

 (2)  
AMM 27-51-20/401, Torque Tube

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AMM 32-00-30/201, Manual Control

 E.
Access

 (1)  
Location Zone
 137 Body Landing Gear Well, LH

 F.
Procedure

 S 424-014
 (1)  
Install the no-coast drag brake (Fig. 402):

 (a)  
Put the support (4) and the safety strap (3) in their position on the airplane.

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