Rev: B
Vizion Install Appendix E C180, C182-
C182D, C185
TruTrak Doc: 255
16
2.9.
Drill Cessna 18X Lower Roll Bracket (1450-128) mounting holes.
2.9.1.
Align the lower bracket mounting holes with row of rivets on
the lower spar flange.
2.9.2.
Match drill the outboard mounting hole using a #19 bit from
inside the wing.
2.9.3.
Secure the outboard hole with a cleco.
2.9.4.
Match drill the remaining 2 holes on the Cessna 18X Lower Roll
Bracket (1450-128) installing a cleco after each hole is drilled.
2.9.5.
Remove all components from the wing and debur the lower
mounting holes.
2.9.6.
Remove the Servo Bolt Pattern Plate (P/N 1420-216) from the
Cessna 18X Upper Roll Bracket (P/N 1450-127).
2.10.
Install anchor nuts in the Cessna 18X Upper Roll Bracket (P/N 1450-127) and
Drill Cessna 18X Lower Roll Bracket (1450-128). Rivet 3 ea. MS21051-08 anchor
nuts in place using 6 ea. MS20426AD3-4 rivets on each bracket.
2.11.
Attach the Cessna 172 Roll Servo Arm (P/N 7200-091) to the 60 inch/lb PMA
servo (P/N 8100-064 for 12 volt or P/N 8100-065 for 24 volt) using the
provided 8-32 x 3/8” flat head screws. Use blue threadlocker (Loctite 242 or
equivalent) and torque the screws to 18-20 in-lb.
2.12.
Allow a sufficient service loop and trim the roll servo wiring harness to length.
2.13.
Terminate the roll servo wiring harness per the Vizion wiring diagram in the
Vizion PMA Installation Guide (TruTrak Doc. 166) and install the 9 Pin
Connector Backshell (2100-010).
2.14.
Place the Cessna 18X Upper Roll Bracket (P/N 1450-127) and Cessna 18X
Lower Roll Bracket (1450-128) in the wing in approximately the final mounting
position but do not secure them to the wing.
2.15.
Connect the roll servo wiring harness connector to the roll servo.
2.16.
Place the roll servo assembly in the wing and loosely attach it to the Cessna
18X Upper Roll Bracket (P/N 1450-127) and Cessna 18X Lower Roll Bracket
(1450-128) using 4 ea. AN3-3A bolts with MS35333-39 lock washers and blue
threadlocker (Loctite242 or equivalent). The next steps must be performed
quickly so that the threadlocker does not begin to cure prior to final torqueing.
The Cessna 172 Roll Servo Arm (P/N 7200-091) should be oriented upward
between the servo stops.
2.17.
Align the Cessna 18X Upper Roll Bracket (P/N 1450-127) with the holes in the
upper spar and start 3 ea. AN526C-832R8 screws in the associated anchor nuts.
2.18.
Align the Cessna 18X Lower Roll Bracket (1450-128) with the holes in the
upper spar and start 3 ea. AN526C-832R8 screws in the associated anchor nuts.
2.19.
Fully tighten the upper and lower AN526C-832R8 mounting screws.
2.20.
Torque the 4 AN3-3A servo mounting bolts to 20-25 in-lb.
2.21.
Remove the inspecting cover near the left aileron bellcrank.
2.22.
Loosen one of the aileron cable turnbuckles to allow for easy removal and
replacement of the bolt connecting the aileron cable to the bellcrank.
2.23.
Remove the rear aileron cable bolt from the left aileron bellcrank and replace
with hardware as shown in Figure 3-7. Torque the AN-3 bolt to 20-25 in-lb.
