MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR
MT-7-420
9/02
18
4. TAIL ASSEMBLY:
With the airplane in level position, the stabilizers should be leveled at their rear spars.
The hinge line should be straight from tip to tip. The vertical stabilizer should be plumb at the
hinge.
5. AILERONS:
Adjust the ailerons to streamline position by placing a straight edge on the bottom of the
wing chordwise at the inboard end of the aileron. Then adjust the turnbuckles in the aileron
system so the control wheels are centered and there is a gap of zero to ¼ inch between the
straight edge and the trailing edge of the aileron.
Check the aileron travel for 20
°
±
1
°
up and 20
°
±
1
°
down. Adjust turnbuckles to stay with-
in these limits. Proper cable tension is 15 to 25 lbs.
6. FLAPS:
Adjust the first notch flap position to be aligned with the aileron trailing edge with the ailer-
ons centered. Check the flap travel with flap handle at fully retracted (handle down) position
for negative 7
°
±
1
°
up, and 24
°
±
3
°
down for second notch, and 40
°
±
3
°
down for third notch.
Adjustment, if needed, may be accomplished by adjusting turnbuckles located above front
seats through headliner.
7. RUDDER:
Check the rudder travel for 21
°
±
1
°
right and left. Rudder cable tension is controlled by
springs, and the cables should not be slack with the rudder centered. Rudder trim may be
accomplished by adjusting the tension of the rudder centering springs located behind the rear
bulkhead. Keep springs as short as possible but never less than 4½ inches from end coil to
end coil with the rudder centered.
8. ELEVATORS:
Elevator control movements are up 30
°
±
1
°
, down 20
°
±
1
°
. Stops are located on the verti-
cal tail rear spar just inside the inspection plate. Proper cable tension is 25 to 45 lbs. Eleva-
tor down spring tension is 5 lb., + 1 lb. minus 0 lb. average load measured at trailing edge.
9. ELEVATOR TRIM:
Elevator trim tab movement is 12
°
±
2
°
up, 38
°
±
2
°
down. If adjustment is needed, it
may be done at the turnbuckles located just aft of the trim control. Proper cable tension is 15
to 25 lbs.
