AILERON TRIM DRUM - INSPECTION/CHECK
1. General
A. This data consists of illustration and wear limit charts. No procedure is given for gaining access to permit inspection. For this information, refer to component removal/installation.
2. Aileron Trim Drum Wear Limits
G04007
500 Aileron Trim Drum Wear Limits
Aug 15/73 Figure 601 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-11-131 Page 601
INDEX NO. PART NAME DIM DESIGN LIMITS WEAR LIMTS REPLACE WORN PART REPAIR WORN PART REPAIR INSTR.
DIAMETER MAX WEAR DIM. MAX DIAM CLEAR-ANCE
MIN MAX
1 BEARING ID 0.6245 0.6250 0.6250 0.0025 *[1]
SHAFT OD 0.6235 0.6245 0.6230 X
2 SUPPORT ID 1.3748 1.3753 1.3760 0.0020 X
BEARING OD 1.3745 1.3750 1.3740 *[1]
3 SHAFT SPLINE ID -- -- *[2] *[2]
COUPLER SPLINE OD -- -- *[2]
*[1] REPLACE WHEN RADIAL PLAY OF BEARING EXCEEDS 0.0020 INCH. *[2] REPLACE WHEN SPLINE BACKLASH EXCEEDS 0.0120 INCH.
G08990
Aileron Trim Drum Wear Limits 500
27-11-131 Page 602 Figure 601 (Sheet 2) B
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Aug 15/73
AILERON TRIM GEARBOX - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Control Column Protractor Assembly-4MIT65B80307-1 (Preferred) or F52485-500 (Optional) which is used with the following adapters:
(1)
Aileron Control Wheel Protractor Mount-F72790
(2)
Forward Thrust Lever Protractor Adapter-F72952-2
B. Rigging Pins Kit-F70207-3, -52, -61, or -84:
REF NO. F70207-( ) DIAMETER (INCHES) LENGTH (INCHES) FUNCTION
A/S-4 A/S-13 -11 -8 0.309-0.311 0.309-0.311 6.7 +0.25 3.7 +0.25 Aileron Bus Drum Aileron Trim Gearbox
D. Grease - MIL-G-23827 or Corrosion Preventive Compound, MIL-C-11796 (Ref 20-30-21)
2. Prepare to Remove Aileron Trim Gearbox
A. Ensure hydraulic systems A and B are depressurized (Ref 27-11-0 MP).
B. Set aileron trim control knob indicator in zero trim position.
C. Insert rigging pin A/S-13 in aileron trim gearbox.
D. Insert rigging pin A/S-4 in aileron bus drums.
3. Remove Aileron Trim Gearbox
A. Disconnect coupler from trim shaft by removing nuts, washers, and bolts.
B. Push trim shaft up, and disengage from aileron trim gearbox.
C. Disconnect rod assembly from centering spring mechanism by removing cotter pin, nut, washer and bolt.
D. Remove aileron trim gearbox by removing nuts, washers and bolts.
4. Install Aileron Trim Gearbox
A. Check aileron trim gearbox wear (Ref 27-11-141 I/C).
B. Ensure rigging pin A/S-13 is inserted in trim gearbox (Fig. 401).
542
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-11-141 Page 401
G04013
Aileron Trim Gearbox Installation 500
27-11-141Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/67
C. Secure trim gearbox to supporting structure with bolts, washers, and nuts. Attach rod assembly to centering spring mechanism and secure with bolt, washer, nut and cotter pin.
D. Ensure aileron trim control knob is in zero trim position.
E. Lubricate trim shaft splines with grease or corrosion preventive compound.
F. Install trim shaft and position coupler to permit insertion of bolts. Install washers and nuts.
G. Remove rigging pins A/S-4 and A/S-13.
H. Provide system A and system B hydraulic power.
I. Measure effect of aileron trim knob operation. (See figure 402.)
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