TECHNICAL DESCRIPTION, OPERATING, MAINTENANCE AND REPAIR MANUAL
2.3.2 Aileron deflections measurement
Measurement procedure:
1. Attach a protractor with deflection hand at upper aileron trailing edge.
2. Set the aileron in neutral position.
3. Zero the protractor – starting position for measurement.
4. Deflect the aileron fully down/up and read the deflections.
5. Compare, if measured deflections correspond with those ones specified in Control
Surfaces Deflections Record.
6. If not – adjust aileron deflections according to the par 3.11.1.
If there is not a protractor at disposal, can be applied a measurement procedure of the
distance of the deflected control surface trailing edges from a neutral position according to
the figure.
2.3.3 Wing flap deflections measurement
The wing flaps can be set in 4 positions :
- Retracted ( deflection 0° )
- Take-off (deflection 15° )
- Intermediate (deflection 24° )
- Landing ( maximum deflection 35° )
The flap control lever located on the pedestal between the seats. Set flap position is locked
by the deflection of the flap control lever into the appropriate recesses
A protractor measurement procedure is similar to the aileron deflection measurement
procedure. If there is not a protractor at disposal, the following procedure can be applied:
1. Insert a hard drawing paper in a space between a fuselage and flap and hold the drawing
paper to the wing central panel upper surface by means of the adhesive tape.
2. Trace the trailing edge of the retracted flap.
3. Extend the flap to a required position and trace the trailing edge of the set flap again.
4. Remove the drawing paper and directly measure the distances from the “Retracted“
position by means of a ruler.
5. Compare, if measured deflections correspond with those ones specified in Control
Surfaces Deflections Record.
6. If not – adjust flap deflections according to the par 3.11.4
The deflection of left flap against right flap may be adjusted on the last short rod, which
is attached to a flap lever.
2.3.4 Elevator deflections measurement
A protractor measurement procedure is similar to the aileron deflection measurement
procedure. If there is not a protractor at disposal, the following procedure can be applied:
1. Attach the drawing papers to the rudder side surfaces by means of the adhesive tape.
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