Cessna 1969-1976 172 Series Service Manual page 65

SECTION 4
WINGS AND EMPENNAGE
TABLE O F CONTENTS Page
WINGSANDEMPENNAGE
. . .
Wings
. . . . . . . . . . .
Description
. . . . . .
Removal.
. . . . . . .
Repair.
. . . . . . . .
Installation
. . . . . .
Adjustment
. .
,
. .
,
Wing Struts
. . . . . . . .
Description
. . . . . .
Removal and Installation
Repair.
. . . . . . . .
Fin
. . . . . . . . . . . .
4-1. WINGS AND EMPENNAGE.
. . . . . .
4 - 1
. . . . . .
4-1
. . . . . .
4-1
. . . . . .
4-1
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
. . . . . .
4-3
4-2. WINGS. (See figure 4 - 1 . )
4-3. DESCRIPTION. Each all-metal wing is a s e m i -
cantilever, semimonocoque type, with two main s p a r s
and suitable r i b s for the attachment of the skin. Skin
panels are riveted to ribs, s p a r s and s t r i n g e r s to com-
plete the structure. An all-metal, piano-hinged ail-
eron, f l a p and
a
detachable wing tip are mounted on
each wing assembly. A single metal fuel tank is moun-
ted between the wing s p a r s a t the inboard end of each
wing. The leading edge of the left wing may be equip-
ped with landing and taxi lights (thru 1970 Models).
Colored navigation lights
are
mounted a t each wing tip.
4-4. REMOVAL. Wing panel removal is most
eas-
ily accomplished
if
four men are available to handle
the wing. Otherwise, the wing should be supported
with
a
sling
o r maintenance stand when the fastenings
are loosened.
a. Remove wing root fairings and fairing plates.
b. Remove
all
wing inspection plates.
c . Drain fuel f r o m tank of wing being removed.
d. Disconnect:
1. Electrical w i r e s a t wing root disconnects.
2. Fuel lines at wing root. (Refer to precau-
3. Pitot line (left wing only) a t wing root.
4 . Cabin ventilator hose a t wing root.
5. Wing leveler vacuum tube, if installed, a t
wing root.
e. Slack off tension on aileron cables by loosening
turnbuckles, then disconnect cables a t aileron bell-
cranks. Disconnect flap cables a t turnbuckles above
headliner, and pull cables into wing root a r e a .
I t i o n s outlined in Section 12.
Description
. . . . . . . . . . . .
4-3
Removal
. . . . . . . . . . . . . .
4 -3
Repair.
. . . . . . . . . . . . . .
4 -4
Installation.
. . . . . . . . . . . .
4-4
Horizontal Stabilizer
. . . . . . . . . .
4-4
Description
. . . . . . . . . . . .
4-4
Removal and Installation.
. . . . . .
4-4
Repair.
. . . . . . . . . . . . . .
4 -5
Stabilizer Abrasion Boots 4 -7
Description 4-7
Removal.
. . . . . . . . . . . . .
4-7
Installation.
. . . . . . . . . . . .
4-7
. . . . . . . .
I
. . . . . . . . . . . .
NOTE
T o ease rerouting the cables, a guide wire
may be attached to each cable before i t is
pulled free of the wing. Cable may then be
disconnected f r o m wire. Leave guide wire
routed through the wing; it may be attached
again to the cable during reinstallation and
used to pull the cable into place.
f . Support wing a t outboard end and disconnect
strut at wing fitting. Tie the strut up with wire to
prevent it f r o m swinging down and straining strut-to-
fuselage fitting. Loosen lower s t r u t fairing and slide
it up the strut, the strut may then be lowered without
damage.
NOTE
It is recommended that flap be secured in
streamlined position with tape during wing
removal to prevent damage, since flap will
swing freely.
g. Mark position of wing attachment eccentric bush-
ings (refer to figure 4-1); these bushings a r e used to
rig out "wing heaviness.
I '
h. Remove nuts, washers, bushings and bolts
attaching wing s p a r s to fuselage.
NOTE
It may be necessary to rock the wing slightly
while pulling attaching bolts, o r to use
a
long
drift punch to drive out attaching bolts.
i .
Remove wing and lay on padded stand.
Change
3
4-1