Cessna T188C - Page 366

MODEL 188 & T188 SERIES SERVICE MANUAL
GENERAL NOTES
1.
Balance control
surfaces
in a draft-free
area.
2. Place hinge bolts through control surface hinges, and position on knife edge balancing mandrels.
Be sure hinge bolt shank rests on knife edge.
3. Make sure all control surfaces are in their approved flight configuration: painted, trim tabs installed.
all foreign matter removed from inside of control surface, elevator trim tab push-pull rod installed,
and all
tips
installed.
4. Place balancing mandrels on a table or other suitable flat surface.
5. Adjust trailing edge support to fit control surface being balanced while center of balancing beam is
directly over hinge line. Remove balancing beam and balance the beam itself by moving the adjust-
able weight (fastened by bolt & washer). Fine balance may be accomplished by use of washers at
long screw on end of beam.
6. When positioning balancing beam on control surface, avoid rivets to provide a smooth surface
for the
beam, and keep the
beam 90° to the hinge
line of the control surface.
7. Paint is a considerable weight factor. In order to keep balance weight to a minimum, it is
recommended that existing
paint be removed before
adding paint to a control
surface. Increase
in balance weight will also be limited by the amount of space available and clearance with
adjacent parts. Good workmanship and standard repair practices should not result in unrea-
sonable balance weight.
8. The approximate amount of weight needed may be determined by taping loose weight at the
balance weight area.
9. Lighten
balance weight
by drilling off part
of weight.
10. Make balance
weight heavier by fusing bar
stock solder to weight after
removal from control
surface. The ailerons should have balance weight increased by ordering additional weight and
gang channel listed in the
Parts Catalog, and installing
next to existing inboard
weight the
minimum
length necessary for
correct balance, except
that a length which contains
at least
two attaching screws must be used. If necessary, lighten new weight and/or existing weights
for correct balance.