(2)  
Disconnect electrical connector at aileron force limiter.

(3)  
Remove cable shields and disconnect cables ACBA and ACBB at turnbuckles. Secure disconnected cables and tag cables to facilitate reassembly.

(4)  
Disconnect left cables AA and AB at turnbuckles. Secure disconnected cables and tag cables to facilitate reassembly.

(5)  
Remove control cabin air duct.

(6)  
Remove nuts, washers and bolts (4 places) securing aileron control wheel drum assembly to structure.

(7)  
Disconnect roll force transducer electrical cable from forward support rib and bracket (detail B, Fig. 401).

(8)  
Remove bolts (11 places) securing forward and aft support ribs to aileron control wheel drum.

(9)  
Move support ribs either fore or aft sufficiently so that aileron control wheel drum can be removed without interference.

(10)
Remove aileron control wheel drum while guiding cables ACBA and ACBB through cutouts.

(11)
Remove nut, washers and screws securing cable guards, and remove cable guards.

(12)
Disengage cables AA and AB from aileron control wheel drum.

(13)
If required, remove roll force transducer and aileron force limiter (Ref Chapter 22).

500 
Nov 1/73  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-11-51 Page 411 

B.  Install Aileron Control Wheel Drum
(1)  
If used bolts, bushings, bearings or other components with wear limits are being installed, check for allowable wear (Ref 27-11-51, Inspection/Check).

(2)  
Check that fork is secured to drum with self-locking shear nut and complete bolt chamfer is exposed beyond end of nut.

WARNING:  IF AN INCORRECT TENSION TYPE SELF-LOCKING IS INSTALLED INSTEAD OF A SELF-LOCKING SHEAR NUT, CAPTAIN'S COLUMN COULD BECOME DETACHED FROM FORK, RESULTING IN LOSS OF CONTROL FROM CAPTAIN'S CONTROL WHEEL.

(3)  
If required, install roll force transducer and aileron force limiter (Ref Chapter 22).

(4)  
Lubricate cables AA and AB with grease and secure to aileron drum. Install cable guards and secure with screws, washers and nuts (Fig. 401).

(5)  
Guide ends of cables ACBA and ACBB through cutouts, and simultaneously position aileron control wheel drum into place.

(6)  
Attach forward and aft support ribs to aileron control wheel drum with bolts (11 places).

(7)  
Connect roll force transducer electrical cable to forward support rib and bracket (Detail C).

(8)  
Secure aileron control wheel drum assembly to structure with four bolts, washers and nuts.

(9)  
Connect cables ACBA, ACBB, AA, and AB to their respective turnbuckles. Tighten turnbuckles to remove cable slack but maintaining zero cable tension.

(10)
Connect roll force transducer and aileron force transducer electrical connectors.

(11)
Install control cabin air duct as follows:

(a)  
Join ducts with a minimum of 1/2-inch overlap at each end.

(b)  
Reconnect mounting brackets, as required.

(c)  
Clean areas where ducts join with cleaning solvent.

(d)  
Tape joints with two laps of vinyl tape. Pull tape taut and smooth while applying.

(12)
Remove all rigging pins (Fig 402).

(13)
Ensure that aileron trim control knob is in zero trim position. Insert rigging pin A/S-13 into aileron trim gearbox.

(14)
Position captain's and first officer's aileron control wheels in neutral by placing a straightedge across upper ends of each control wheel (Fig 403). One end of first officer's control wheel may be out of contact with the straightedge by a maximum of 0.20 inch. Insert rigging pin A/S-lA.

(15)
Adjust cables ACBA and ACBB at turnbuckles to tension specified in figure 402.

(16)
Remove rigging pin A/S-lA. Rigging pin should withdraw freely from holes.

(17)
Remove straightedge from control wheels and rotate control wheels through several cycles.

(18)
Center control wheels and check rigging by placing straightedge across upper ends of control wheels. All four ends of control wheels should contact straightedge. However, one end of first officer's control wheel may be out of contact by 0.20 inch maximum.

(19)
Install turnbuckle locking clips.

(20)
Install cable shields and clamps.

(21)
Adjust left aileron control cables AA and AB.

(a)  
Place aileron control wheels in neutral position by clamping straightedge across upper ends of both wheels. One end of first officer's control wheel may be out of contact by 0.20 inch maximum.
　
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