PS-28 Cruiser
PS-28N Cruiser
CR-MM-1-0-00
CHAPTER 6 – CONTROL SYSTEM
Revision No.: 22
Date of issue: 2018-09-27
6 - 6
6.3 Removal / Installation
6.3.1 General principles for work on control system
Push rod assembly
Type of maintenance: heavy
Authorization to perform:
See point 2.5.3.
Tools needed:
wrench size 7/16 in
Set the push rods to the prescribed length before assembling, tighten the nuts slightly, and do
not secure them for the time being. It is necessary to keep the following principles:
a) Terminal thread must overlap the inspection hole in the push rod
b) Terminals of all push rods must be uniformly screwed for setting the neutral position
that serve for adjustment of control.
Grease bearings with lubricant grease before installing the push rods into airplane unless
otherwise stated by the bearing manufacturer. Do not grease nor rinse the bearings with
permanent filing that are covered by metal or plastic covers. Do not rinse bearings and
articulated joints with technical gasoline. Mechanically remove contaminated lubricant grease
carefully and refill the clean one.
Orientation of bolts and cotter pins
Put the bolts to the joint on the basis of “top-down” rule or “From the front to the back" with
regard to the flight direction. This rule decreases possibility of spontaneous bolt falling out of the
clamp joint in case that nut unlocking and falling out occurs in the course of operation. Follow
the same rule also in case of securing nuts by securing pins or by cotter pins, with the exception
of those cases when it is not possible to install the bolt for design or operation limitation reasons.
Lubrication
At assembling parts grease al joints and friction surfaces (bolts, pins, and threads) after
mechanical or chemical cleaning by lubricant grease.
6.3.2 Control stick removal
Type of maintenance: heavy
Authorization to perform:
See point 2.5.3.
Tools needed:
wrench size 7/16 in, 3/8 in
cutting pliers
a) Unscrew the nut (6, Fig. 6-7), remove the washers (7), bolt (5) and disconnect the elevator
control rod (26) and fork on the transmission tube (1).
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