Wings Installation; Winds Adjustment - Correctiong "Wing-Heavy" Condition; Fin Removal And Installation - Cessna 177 SERIES Service Manual

e. If left wing is being removed, disconnect flap
d. Connect.
cables at turnbuckles, and remove cable guards and/
1. Electrical wires at wing root disconnects.
or pulleys as necessary to pull flap cables into left
2. Fuel lines at wing root.
wing root area. Disconnect flap follow-up control
3. Pitot line (if left wing is being installed).
from follow-up control arm and pull control out of
4. Cabin ventilator hoses at wing root.
wing area. Disconnect electrical lead at flap motor
e. Rig aileron system (Section 6).
quick-disconnect. Refer to figure 7-1 for flap cable
f. Rig flap system (Section 7).
routing, turnbuckle location, and details of flap sys-
g. Refuel wing tank and check all connections for
tem.
leaks.
h. Check operation of navigation, courtesy and land-
NOTE
ing lights. (Landing lights thru 1970 Models.)
i. Check operation of fuel gage.
It is recommended to secure flap in stream-
j. Install wing gap fairings and fillets.
lined position with tape during wing removal
to prevent damage since flap will swing freely.
NOTE
f. Remove nut, washer and bolt attaching front fuel
Be sure to install soundproofing panel in wing
spar to fuselage.
gap before replacing fairings.
g. Remove bolts, washers, and retainers that hold
main spar dowel pins in position.
k. Install all inspection plates, interior panels and
h. Support wing at inboard and outboard end, and
upholstery.
remove dowel pins that attach main wing spar to
L Test operate flap and aileron systems.
fuselage. It is best to remove the top dowel pin first,
then lower outboard end of wing before removing the
4-7. ADJUSTMENT (CORRECTING "WING-HEAVY"
bottom dowel pin.
CONDITION). If considerable control wheel pressure
is required to keep the wings level in normal flight,
NOTE
a wing-heavy condition exists. Refer to Section 6 for
adjustment of aileron tabs.
It may be necessary to use a long punch to
drive out main wing spar attaching dowel
4-8. FIN. (Refer to figure 4-2).
pins, or to rock the wings slightly while
removing the pins.
Care must be used not 4-9. DESCRIPTION. The fin is primarily of metal
to damage dowel pins, spar fittings, or spar
construction, consisting of ribs and spars, covered
carry-thru fittings as these are reamed
with skin. Fin tips are of ABS construction.
Hinge
|
holes and close tolerance dowel pins. brackets at the rear spar attach the rudder.
Brack-
ets containing rudder stop bolts are attached at the
i. Remove wing and lay on padded stand.
rear spar.
4-5.
REPAIR. A damaged wing panel may be re- 4-10.
REMOVAL. The fin may be removed without
paired in accordance with instructions outlined in
first removing the rudder. However, for access and
Section 18.
Extensive repairs of wing skin or struc- ease of handling, the rudder may be removed, follow-
ture are best accomplished using the wing repair jig,
ing procedures outlined in Section 10.
which may be obtained from Cessna.
The wing jig a.
Remove stabilator tab actuator arm and remove
serves not only as a holding fixture, making work on
stinger.
the wing easier, but also assures absolute alignment
b. Remove stabilator trim tab bellcrank.
of the repaired wing.
c. Disconnect flashing beacon lead, tail navigation
light lead, antennas and antenna leads, and rudder
4-6. INSTALLATION.
cables if rudder has not been removed.
a. Hold wing in position with wing tip low. d. Remove screws attaching dorsal to fuselage and
b. Install:
fin and remove dorsal and dorsal fairing.
1. Dowel pins attaching main spar to fuselage.
e. Remove bolts attaching fin rear spar to bulkhead
(Install bottom pin first, then rotate wing up and in- and remove bolts attaching bracket at fin front spar
stall top pin. )
to fuselage.
f. Remove the fin.
NOTE
4-11. REPAIR. Fin repair should be accomplished
Refer to figure 4-1 for lubrication of in accordance with applicable instructions outlined in
dowel pins prior to installation.
Section 18.
2.
Bolts, retainers, washers, and nuts that 4-12. INSTALLATION.
Reverse the steps outlined
hold main spar attach dowel pins in position. in paragraph 4-10 to install the fin. Check and reset
3. Front fuel spar attach bolt, washer and nut.
rudder and stabilator travel if any stop bolts were
c. Route flap and aileron cables and make proper removed or settings disturbed.
connections.
4-2 Change 5