CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 6 – CONTROL SYSTEM
Date of issue: 2011-11-08
Revision No.: 2
6 - 23
Measuring wing flap deflections
a) Attach the protractor with the deflecting pointer on the upper flap skin by means of the clamp.
b) Set the wing flap to the 0°position.
c) Set the protractor to 0° - starting value of measuring.
d) Extend the flaps by means of the flap actuator to individual positions and read the deflection.
e) Check deflection values according to the Tab. 6-1.
Measuring elevator deflections
a) Set the protractor with the deflecting pointer on the trailing edge of the elevator by means of
the clamps.
b) Set the elevator to neutral position.
c) Set the protractor to 0° - starting value of measuring.
d) Deflect the elevator to extreme positions by means of the control stick and read the
deflection.
e) Check values of deflections according to the Tab. 6-1.
Measuring rudder deflections
The airplane manufacturer uses a special jig for measuring rudder deflections that is slid on the
vertical tail unit and it is possible directly to read the rudder deflection. If you do not have this
special jig, use the alternative procedure:
a) Set the rudder to neutral position.
b) Put the rod to the trailing edge of the rudder and mark the lower margin of the rudder trailing
edge.
c) Deflect the rudder to extreme positions and with the rule measure distance from the sign to
the lower margin of the rudder trailing edge.
d) Calculate angle and compare it with the value mentioned in the Tab. 6-1.
Measuring trim tab deflections
a) Set the protractor with the deflecting pointer to the trailing edge of the trim tab by means of
the clamp.
b) Set the trim tab to neutral position.
c) Set the protractor to 0° - starting value of measuring.
d) By means of the trim control actuator deflect the trim tab to extreme positions and read the
deflection.
e) Check values of deflections according to the Tab. 6-1.
6.4.4 Adjustment of control surface deflections
Adjustment of control surface deflections to be made to the values showed in the Tab. 6-1. At
adjusting the airplane control, neutral position of the control surfaces is taken as the starting
point.
CAUTION:
AFTER ADJUSTMENT OF CONTROL SURFACE DEFLECTIONS CHECK,
IF THE END PIECES ARE SEEN THROUGH THE INSPECTION HOLE OF
CONTROL RODS.
