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G.  Lift the aft section of the tunnel carpet far enough to remove the screws securing the tunnel cover that is between the flap handle and the spar cover.  Remove the cover.
H.  Remove the cotter pin cable guard from the flap cable pulley located inside the floor tunnel just ahead of the spar housing.
I.  Remove the cable rub blocks located in the floor opening on the aft side of the spar housing by removing the attachment screws.
J.  Disconnect the cable turnbuckle at the flap handle by removing cotter pin, nut and bolt.
3.  Remove the flap handle and bracket by disconnecting the cable turnbuckle from the handle and removing the bolts securing the bracket to the floor tunnel.
27-50-00 Page 27-58 Issued: April 1, 1997
INSTALLATION OF WING FLAP CONTROLS.  (Refer to Figure 27-25.)
1. The nap torque tube assembly may be installed by the following procedure:
A. Install the chain sprockets with chains on the torque tube and secure with bolts, washers and nuts.
B. Slide the tube stop fittings on their respective ends of the torque tube.
C. Ascertain that one bearing block fitting is installed between its attachment brackets.
D. Slide the other bearing block over its respective end of the torque tube.

1.
BRACKET, ROD ATTACHMENT 17. SPROCKET, TENSION SPRING

2.
BOLT, WASHER & NUT 18. BOLT, WASHER & NUT

3.
JAM NUT 19. BRACKET, BEARING BLOCK

4.
ROD, FLAP CONTROL 20. CHAIN, TENSION SPRING

5.
BOLT, BEARING BLOCK ATTACHMENT 21. CLEVIS BOLT, BUSHING NUT & COTTER PIN

6.
BRACKET, BEARING BLOCK 22. SPRING, TENSION

7.
BLOCK, BEARING 23. CABLE, FLAP CONTROL

8.
NUT, LOCK 24. PULLEY

9.
SCREW, FLAP ADJUSTMENT 25. TURNBUCKLE

10.
BOLT, WASHER & NUT 26. CLEVIS BOLT, NUT & COTTER PIN

11.
CRANK (ARM), TORQUE TUBE 27. BOLT, BUSHING, WASHER & NUT

12.
BOLT, WASHER & BUSHING 28. BRACKET, FLAP HANDLE

13.
FITTING, TORQUE TUBE STOP 29. FLAP HANDLE

14.
TUBE, TORQUE 30. CHAIN, RETURN SPRING

15.
BOLT, WASHER & NUT 31. BLACK, BEARING

16.
BLOCK, BEARING 32. SPRING, RETURN

33. BUTTON, FLAP RELEASE
Figure 27-25. Flap Controls and Rigging 
2D12  27-50-00 Page 27-59 Issued: April 1, 1997 

E.  Position the torque tube by placing the end with the bearing block on it between the mounting bracket and sliding the other end into the previously attached bearing block.
F.  Position the remaining bearing block and secure with bolts, washers and nuts.
G.  Push the torque tube cranks (arms) on each end of the torque tube and slide the stop fitting in place. Align the bolt hole of the crank and stop fitting with the holes in the torque tube, and install bolts.The holes in the stop fitting are elongated to allow the stop fitting to be pushed against the bearing blocks thus allowing no side play of the assembly.Tighten the bolt assemblies on the stop fittings.
H.  Install the tube support blocks on their support brackets and secure with bolts.
I.  Connect the nap return spring to the return chain and! or at the spar housing.
J.  Connect the control cable end to the tension chain and secure with bushing, clevis bolt, nut and cotter pin.
K.  Pull the flap handle full back and connect the tension spring. Release the nap handle to the forward position.
L.  Connect the nap control tube to the flap and/ or torque tube crank and secure.The bolt and bushing that connects the control tube to the crank is installed through a hole in the side of the fuselage located over the torque tube.
2.  
To install the nap handle with bracket, place the assembly on the floor tunnel and secure with bolts.

3.  
The nap control cable may be installed by the following procedure:

A.  Attach the cable and turnbuckle to the flap handle arm and secure with a new clevis bolt, nut and cotter pin. Ascertain that the turnbuckle end is free to rotate on the arm.
B.  Route the cable through the tunnel and spar housing.
C.  Install the cable rub blocks on the aft side of the spar housing and secure with screws.
D.  Install cotter pin cable guard over pulley located just ahead of the spar housing in the forward floor tunnel.
E.  Attach the cable end to the tension chain and secure with bushing, clevis bolt, nut and cotter pin.If the chain is not installed because of the torque tube assembly being removed, install the assembly as given in Step 3.
F.  Pull the flap handle full back and connect the tension spring to the cable end.
4.  
Install the tunnel cover and secure with screws. Also the tunnel carpet, heat deflectors, and bracket cover.
　
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