RUDDER FEEL AND CENTERING UNIT - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Rigging Pins Kit - F70207-3, -52, -61, or -84:
REF NO. F70207-( ) DIAMETER (INCHES) LENGTH (INCHES) FUNCTION
R-3 R-4 R-5 -11 -11 -11 0.309-0.311 0.309-0.311 0.309-0.311 6.7 +0.25 6.7 +0.25 6.7 +0.25 Captain's FWD Quadrant F/O's FWD Quadrant Feel and Centering Mechanism
B. Grease - MIL-G-23827 (Ref 20-30-21)
C. Scale - 0 to 2 feet, graduated in inches, tenths and hundredths of an inch
2. Prepare for Removal
A. Remove rudder systems A, B, and standby hydraulic power (Ref 27-21-0 MP).
B. Install rigging pins R-3 and R-4 per Fig. 401.
C. Remove Rudder trim actuator (Ref 27-21-111 R/I). Remove rigging pin R-5.
3. Remove Rudder Feel and Centering Unit
A. Remove nuts, washers, and dual bolt connecting feel and centering unit crank and trim and feel rod.
B. Remove upper bearing housing bolts.
C. Hold feel and centering unit in place while removing bolts attaching two support brackets to bulkhead and removing lower bearing housing bolts.
D. Remove feel and centering unit and two support brackets, then separate upper and lower bearing housings from unit.
4. Prepare for Installation
A. Remove rudder systems A, B, and standby hydraulic power (Ref 27-21-0 MP).
B. Check feel and centering unit for allowable war (Ref 27-21-82 I/C).
CAUTION: FEEL OUTPUT ROD IS A DUAL LOAD PATH COMPONENT. INSPECT INNER AND OUTER RODS FOR DAMAGE PRIOR TO INSTALLATION.
C. Lubricate spring slider shaft (Fig. 401) (Ref 12-22-21).
527
Feb 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-21-82 Page 401
5. Install Rudder Feel and Centering Unit
A. Position two support brackets and feel and centering unit with upper and lower bearing housings, then install bolts attaching two support brackets to bulkhead.
B. Install lower bearing housing bolts.
C. Install upper bearing housing bolts.
D. Install nuts, washer and dual bolt connecting feel and centering mechanism crank and trim and feel rod. First tighten nut on outer bolt to 45-60 pound-inches, then tighten nut on inner bolt to 12-15 pound-inches.
CAUTION: AFTER TIGHTENING NUT ON INNER BOLT, DO NOT RESET TORQUE FOR NUT ON OUTER BOLT. NUT ON INNER BOLT MAY BECOME LOOSE.
E. Install rigging pin R-5, and remove rigging pins R-3 and R-4.
F. Install and adjust rudder trim actuator (Ref 27-21-111, Removal/Installation).
G. Restore airplane to normal hydraulic configuration (Ref 27-21-0).
H. Remove rigging pin R-5, if installed.
I. Test feel and centering unit.
(1)
Disconnect pushrod to nose wheel steering outboard of captain’s forward quadrant.
NOTE: Nose gear steering need not be disconnected if airplane is jacked so that nose gear is fully extended.
(2)
Provide rudder systems A and B hydraulic power (Ref 27-21-0).
(3)
Push rudder pedals through at least three full cycles.
(4)
Check that rudder trim knob is in neutral position.
(5)
Move captain’s left rudder pedal approximately 0.5 inch forward and release. Check that rudder returns to neutral position where both sides of rudder trailing edge are within width of tab on index plate (Fig. 402).
503
27-21-82 Page 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jan 20/82
G27235 G27244
503 Rudder Feel and Center Unit Installation
Jun 20/83 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-21-82 Page 403
Rudder Travel and Index Plate 501
27-21-82Page 404 Figure 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 01/74
(6)
Repeat step (5) with captain’s right rudder pedal.
(7)
Move captain’s left pedal until forward quadrant stop is contacted. Check that rudder movement is per Section A-A, Fig. 402.
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