(2)  
Wrap cable ATB 6-1/4 turns around aft end of cable drum.

(3)  
Use phenolic faced clamps to secure cables in wrapped positions.

(4)  
Position cable drum and sleeve on shaft , and secure with screw, washer, and nut.

(5)  
Place stop assembly over sleeve and install retainer ring.

(6)  
Install retainer plate on aft bearing housing and secure with washers, and screws.

(7)  
Place aft bearing housing on shaft, and secure with washer and nut.

(8)  
Place forward end of shaft into forward bearing housing.

C.  Place aileron trim control unit assembly into position within control stand.
D.  Install four washers and screws to retain aft bearing housing to control stand structure.
506 
Aug 15/73  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-11-121 Page 405 

E.  Install spacers, screws, washers, and nuts to retain forward bearing support to control stand structure.
F.  Manually position stop assembly as shown in detail A by rotating shaft.
NOTE:  The aileron trim control knob and shaft are each equipped with a blind, mating spline. When the stop assembly and aileron trim control knob are in neutral position, the blind splines are mated at the 12 o'clock position.
G.  Position adapter plate on aileron trim knob and secure with three screws.
H.  Position aileron trim control knob in neutral and mate with shaft. Secure knob with three mounting screws.
I.  Connect wire to base of aileron trim knob.
J.  Position aileron trim knob indicator in zero trim position. Tape aileron trim control knob to prevent movement.
K.  Reconnect cables ATA and ATB to turnbuckles but maintain zero cable tension.
L.  Remove phenolic faced clamps securing cables at cable drum and adjacent to turnbuckles.
M.  Ensure rigging pin A/S-13 is installed.
N.  Adjust cables ATA and ATB to tension specified in Fig. 402, so that rigging pin A/S-13 may be inserted and removed without binding.
O.  Ensure cables ATA and ATB are properly wrapped around cable drum. Cable ATA should be wrapped a minimum of 5-1/4 turns counterclockwise and cable ATB a minimum of 6-1/4 turns clockwise.
P.  Remove rigging pin A/S-13 and remove tape from aileron control knob. Cycle system through maximum travel to obtain constant rigging tension.
Q.  Insert rigging pin A/S-13. Check that aileron trim control knob is in zero trim position. Check that cable tension is within values shown on Fig. 402.
R.  Install turnbuckles locking clips and remove rigging pin A/S-13.
S.  Test aileron trim control unit (Ref 27-11-121, Adjustment/Test).
T.  Install access panel on right side of control stand, and secure with screws.
27-11-121 Aug 15/73 Page 406
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

G05727
500  Aileron System Rigging Pin Location 
May 15/81  Figure 402  27-11-121 
Page 407 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

AILERON TRIM CONTROL UNIT - ADJUSTMENT/TEST
1.  Equipment and Materials
A.  Control Wheel Protractor Mount, F72790
B.  Rudder trim Knob Torque Adapter -SE27-2008
C.  Control Wheel Torque Wrench Adapter, F72867-1 (preferred), F80075-1 (optional)
2.  Aileron Trim Control Unit Test
A.  Install mount and protractor on first officer's control wheel.
B.  Remove medallion from captain's control wheel and install torque wrench adapter (Fig. 501).
C.  Provide system A and B hydraulic power (Ref 27-11-0, Maintenance Practices).
D.  Measure effect of aileron trim knob operation.
(1)  
Operate aileron trim knob clockwise to 10 unit position.

(2)  
Using torque wrench and torque wrench adapter measure force required to rotate aileron control wheel 75 degrees counterclockwise. If torque wrench adapter is not available, force may be measured by applying force tangentially to captain's control wheel at 6.5 inch radius. Force should not exceed 137 pound-inches torque or 21 pounds.

(3)  
Release control wheel from 75° counterclockwise. Check that control wheel returns to 60 +3 degrees clockwise.

(4)  
Repeat steps (1) thru (3) in opposite direction.

(5)  
Measure aileron trim knob force.

(a)  
Install rudder trim knob torque adapter on aileron trim knob.
　
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