(b)
Measure force required to rotate knob clockwise to stop, then counterclockwise to stop, then back to zero. Force should not exceed 15 pound-inches.
(c)
Remove torque adapter.
E. Return airplane to normal.
(1)
Place aileron trim control knob in neutral position.
(2)
Remove protractor and mount from control wheel.
(3)
Remove torque wrench adapter from control wheel.
(4)
Remove systems A and B hydraulic power (Ref 27-11-0)
(5)
If no longer required, remove electrical power.
501
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-11-121 Page 501
G03842
Control Wheel Torque Wrench Adapter 500
27-11-121 Figure 501 Nov 15/80
Page 502
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
AILERON TRIM DRUM - REMOVAL/INSTALLATION
1. General
A. The removal of aileron trim drum disturbs the sealed surface of the pressure deck. Therefore, the base of the trim drum support must be resealed upon reinstallation (Ref Chapter 51, Seals and Sealing).
2. Equipment and Materials
A. Rigging Pins Kit - F70207-3, -52, -61, or -84:
REF NO. F70207-( ) DIAMETER (INCHES) LENGTH (INCHES) FUNCTION
A/S-13 -8 0.309-0.311 3.7 +0.25 Aileron Trim Gearbox
B. Control Column Protractor Assembly-4MIT65B80307-1 (Preferred) or F52485-500
(Optional) which is used with the following adapters:
(a)
Aileron Control Wheel Protractor Mount-F72790
(b)
Forward Thrust Lever Protractor Adapter-F72952-2
C. Control Wheel Torque and Force Test Adapter-F72867-1
D. Drill Jig. Aileron Trim Input Shaft-F80181-1
3. Prepare to Remove Aileron Trim Drum
A. Depressurize hydraulic systems A and B (Ref 27-11-0 MP).
B. Set aileron trim control knob indicator in zero trim position (Fig. 402).
C. Insert rigging pin A/S-13 in aileron trim gearbox (Fig. 401).
4. Remove Aileron Trim Drum
A. Disconnect cables ATA and ATB at turnbuckles, and secure disconnected cables with phenolic faced clamps (Fig. 401).
B. Tag disconnected cables to facilitate reassembly.
C. Mark relative positions of coupler to upper and lower trim shafts.
D. Remove nuts, washers, and bolts securing coupler to trim shafts, and remove coupler.
E. Remove screws securing cable drum support to pressure deck, and remove aileron trim drum assembly.
F. Disassemble aileron trim drum as follows:
(1) Remove cables ATA and ATB from trim drum by removing guards.
542
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-11-131 Page 401
G03925
Aileron Trim Drum Removal/Installation 500
27-11-131 Figure 401 May 15/77
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(2)
Remove nut and washer from cable drum shaft.
(3)
Separate support from cable drum shaft.
(4)
Remove bearing, spacer, bearing, ring seal and packing from interior of support.
5. Install Aileron Trim Drum
A. If used bolts, bushings, bearings or other components with wear limits are being installed, check for allowable wear (Ref 27-11-131, Inspection/Check).
B. Reassemble aileron trim drum as follows:
(1)
Install packing, ring seal, bearing, spacer and bearing in support (Fig. 401).
(2)
Place support on cable drum shaft, and install washer and nut.
(3)
Equally wrap cables ATA and ATB on cable drum 4-1/4 turns, and install guards (Fig. 402).
(4)
Secure cables with phenolic faced clamps at face of cable drum.
G03971
506 Aileron Trim Control Wheel Neutral Position
Aug 15/73 Figure 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-11-131 Page 403
C. Insert cable drum shaft in hole in pressure deck, and position cable drum with centerline of cable slot facing aft. Secure support to pressure deck with screws.
D. Seal base of trim drum support (Ref Chapter 51, Seals and Sealing).
E. If existing parts are being installed, connect cable drum shaft to splined shaft with coupler. Check that dimension at splined connection is per Detail A, Fig. 501. If dimension is not within tolerance, instal1 new drum assembly and coupler. Drill coupler and cable drum shaft per step F.
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