MAULE AEROSPACE TECHNOLOGY, INC.
MAINTENANCE MANUAL
FOR
MT-7-420
9/02
19
10. RUDDER TAB:
This tab is interconnected with the aileron system to automatically coordinate rudder with
aileron to reduce adverse yaw. The tab should normally be streamlined with the rudder when
the aileron and rudder controls are centered.
The tab may be used to adjust rudder trim. In normal cruise, it is desirable to have the ball
centered with the “Rudder Trim” control out to first line. This allows for inflight adjustment of
rudder trim in cruise. Rudder trim may be adjusted by changing the position of the tab cables
located just over the front doors on the inside of the airplane.
The tab travel is 48
°
±
4
°
right or left. Proper cable tension is 5 to 10 lbs.
CAUTION: Make sure tab is free at extreme aileron travel.
NOTE: The “Rudder Trim Control” on the instrument panel pulls on a spring attached to the
right rudder pedal. It is not connected to the tab on the rudder.
LUBRICATION
1.
Main wheel and nosewheel bearings - Use good quality wheel bearing grease.
2.
Control Column - Apply light coat of graphite base lubricant to aileron balance chain,
torque tube and control guide. Use lightweight lubricating oil on all other bearings.
3.
Control pulley bearings and control surface hinges - Use lightweight lubricating oil.
4.
Flap bellcrank and mechanism - Use lightweight lubrication oil.
5.
Aileron and flap hinge - Use lightweight lubricating oil.
6.
Elevator and trim tab - Use lightweight lubricating oil.
FABRIC REPAIRS:
(Applicable to Polyurethane paint on Ceconite fabric only)
REPAIRS:
1.
Small holes and damaged areas can easily be repaired without removing the existing
paint topcoat.
2.
Trim the damaged area to a rectangular or circular shape.
3.
Lightly scuff sand with #320 or #400 wet/dry sandpaper approximately 2 inches around
the repair area.
4.
Mix one part gray urethane primer (catalyst) with two (2) parts gray urethane primer (2:1
ratio - 2 parts paint/1 part catalyst), mixing a very small amount only for coating the
