3.
Adjust the servo travel by the varying the length of the control rod. Check that the initial length of the rod was 10.38 inches.
4.
Check the trim only by swinging the rudder until it contacts its stops and turning the trim control wheel to swing the tab to its limits both left and right. Check the travel obtained with specifications given in Figure 27-14.
5.
To adjust the trim travel left:
A. Add shim washers at the forward end of the barrel to reduce the travel.
B. Remove shim washers at the forward end of the barrel to increase the travel.
6. To adjust the trim travel right:
A. Add shim washers at the aft end of the shaft to reduce the trim travel.
B. Remove shim washers at the aft end of the shaft to increase the trim travel.
7. Check the trim and servo travels by swinging the rudder full left with full right trim and full right rudder with full left trim.
27-20-00 Page 27-37 Issued: April 1, 1997
8.
Check all travels with specifications given in Figure 27-14.
9.
Determine the free play of the rudder tab with the rudder securely held against either stop. Total free travel measured at the tab trailing edge must not exceed 0.15 inch. If this tolerance is exceeded, check the travel control arm assembly for wear at the center bolt and bolt attaching the rudder trim rod to the control arm. Replace the arm assembly and associated hardware if there is any noticeable wear or elongation of the holes. Check the rudder trim barrel end play in the mounting bracket.
RUDDER PEDAL ASSEMBLY.
REMOVAL OF RUDDER PEDAL ASSEMBLY. (Refer to Figure 27-17.)
1.
Remove the access panel to the aft section of the fuselage.
2.
Relieve rudder and stabilator cable tension by loosening one of the rudder and stabilator cable turnbuckles in the aft section of the fuselage.
3.
Remove the fuel selector knobs and cover panels by removing the attachment screws.
4.
Remove the tunnel plate just aft of the tee bar by laying back enough tunnel carpet to remove the plate attachment screws.
5.
Disconnect the stabilator control cable from the lower end of the tee bar assembly.
6.
Remove the tee bar attachment bolts with their washers and nuts which are through each side of the floor tunnel. Pull the lower end of the tee bar aft.
7.
Disconnect the control cable ends from the arms on the torque tube by removing the cotter pins, washers, nuts and bolts.
8.
Disconnect the rudder trim from the torque assembly by removing the cotter pin, washers and bolt that connects the arm to the trim.
9.
Disconnect the close-out rods at the rudder pedals by removing nuts and bolts.
10.
Disconnect the brake cylinders at the lower end of each cylinder rod by removing the cotter pins, washers, nuts and bolts.
11.
Disconnect the vee braces (two braces are used with right hand brakes) from the torque tube by removing nuts, washers and bolts that secure the strap bracket to the vee brace.
12.
If an AutoPilot amplifier is installed over the torque tube at the right side of the fuselage, disconnect the electrical plug and release the two fasteners that secure it to its mounting bracket.
13.
Disconnect the torque tube support bracket where it attaches to the floor tunnel by removing its attach-ment bolts.
14.
Remove the two bolts that extend through the torque tube and are located at the center of the tube assembly over the floor tunnel. Compress the tubes.
15.
Disconnect the torque tube support blocks from their support brackets on each side of the fuselage by removing the attachment nuts, washers and bolts.
16.
Remove the trim side panels, if desired.
17.
Remove the assembly from the airplane. Note the spacer washer on each end and between the support blocks.
INSTALLATION OF RUDDER PEDAL ASSEMBLY. ( Refer to Figure 27-17.)
1.
Assemble the torque tube assembly as shown in Figure 27-17. Do not install the two bolts through the center of the tube assembly at this time.
2.
Place the upper support blocks on the ends of the torque tube assembly. Note that a washer is required on each end of the tube.
3.
Position the support blocks on their mounting brackets at each side of the fuselage and secure with bolts, washers and nuts. Note that a bushing is required in the bolt holes of the upper support block, and a plate on top of the upper block, between the upper and lower blocks and under the block mounting bracket.
27-20-00 Page 27-38 Issued: April 1, 1997
Figure 27-17. Rudder Pedal Assembly
27-20-00
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