Cessna 188 Series Service Manual page 81

MODEL 188 & T188 SERIES SERVICE MANUAL
4-21. DESCRIPTION.
The aircraft may be equipped 4-24. TAILCONE.
with two extruded rubber abrasion boots, one on the
leading edge of each horizontal stabilizer. These 4-25. DESCRIPTION. The tailcone is of semimono-
boots are installed to protect the stabilizer leading
coque-type construction, consisting of skin riveted
edge from damage caused by rocks thrown back by to bulkheads, stringers, and longerons. Four attach
the propeller.
points, one on the forward end of each longeron, are
provided to bolt the tailcone to the welded tubular
4-22. REMOVAL. The abrasion boots can be re- structure. Attach points are provided at the aft end
moved by loosening one end of the boot and pulling
of the tailcone to support the horizontal stabilizer,
it off the stabilizer with an even pressure. Excess
vertical fin, and dorsal.
adhesive or rubber can be removed with Methyl-
Ethyl-Ketone. 4-26. REMOVAL.
a. Remove side panels from tubular structure and
4-23. INSTALLATION. Install abrasion boots as tailcone.
outlined in the following procedures. b. Remove access door from forward bulkhead of
a. Trim boots to desired length. tailcone.
b. Mask off boot area on leading edge of stabilizer c. Remove upper engine cowling.
with 1-inch masking tape, allowing 1/4-inch margin. d. Disconnect elevator and rudder control cables
c. Clean metal surfaces of stabilizer, where boot at turnbuckles.
is to be installed with Methyl-Ethyl-Ketone. e. Disconnect elevator trim tab control cables in-
d. Clean inside of abrasion boot with Methyl-Ethyl- side tailcone and pull forward through forward bulk-
Ketone and a Scotch brite pad to ensure complete re- head.
moval of paraffin/talc.
Then a normal wipedown with f. Disconnect radio antenna lead from antenna and
MEK on a cloth will leave surface suitable for bonding remove clamps attaching lead to bulkheads, if in-
to the aluminum.
stalled.
g. Disconnect flashing beacon and tail light wires
NOTE
at quick-disconnects forward of front bulkhead, if
installed.
Boots may be applied over epoxy primer, but h. Disconnect static line at tee in tailcone and re-
if the surface has been painted, the paint move from forward bulkhead.
shall be removed from the bond area. This i. Disconnect deflector cable from canopy.
shall be done by wiping the surfaces with a j. If optional quick-loader system is installed,
clean, lint-free rag, soaked with solvent, disconnect main tube at aft end.
and then wiping the surfaces dry, before
k. Drill out rivets attaching aft section of canopy
the solvent has time to evaporate, with a to tailcone.
clean, dry lint-free rag. 1. Remove four bolts attaching tubular brace from
canopy to tailcone.
e. Stir cement (EC-1300 Minnesota Mining and m. Jack aircraft in accordance with procedures out-
Manufacturing Co.) thoroughly. lined in Section 2.
f. Apply one even brush coat to the metal and the
inner surface of the boot. Allow cement to air-dry
CAUTION
for a minimum of 30 minutes, and then apply a
second coat to each surface.
Allow at least 30 min- Support front end of aircraft with hoist hooked
utes (preferably one-hour) for drying. into engine lifting eye. Loss of tailcone weight
g. After the cement has thoroughly dried, reacti- will allow nose to drop.
vate the surface of the cement on the stabilizer and
boot, using a clean, line-free cloth, heavily moisten- n. Drill out rivets attaching lower skin to tailcone
ed with Toluol. Avoid excess rubbing which would forward bulkhead.
remove the cement from the surfaces. o. On serials prior to 188-0048, remove four bolts
h. Position boot against leading edge, exercising attaching tailcone to tubular structure. Tailcone may
care not to trap air between boot and stabilizer. have to be held or supported while bolts are removed.
Beginning with serial 188-0048, remove four cotter
NOTE pins and castle nuts from attaching studs. If shims
are used, be sure to identify according to location.
Should boot be attached "off-course", pull it p. Remove tailcone by pulling aft and down. When
up immediately with a quick motion, and removing tailcone, be sure quick-loader tube, anten-
reposition properly. na wire, and cables properly clear aircraft structure.
q. Place tailcone on padded supports.
i. Press or roll entire surface of boot to assure
positive contact between the two surfaces.
j. Apply a coat of GACO N700A sealer, or equiva-
lent. conforming to MIL-C-21067, along the trailing
edges of the boots to the surface of the skin to form a
neat, straight fillet.
k. Remove masking tape and clean stabilizer of
excess material.
1. Mask to the edge of boot for painting stabilizer.
4-9