PIPER SENECA
II SERVICE
MANUAL
14-52. VULCANIZED REPAIRS.
Due to the variety of boot damage possible,
it is recommended that the
B.F. Goodrich Company be contacted so they can determine the extent of damage and whether it is
repairable by the vulcanized method or not. The overall condition of the deicer boot must be given careful
consideration before deciding on
any repairs. Damages can vary from minor
punctures which may be easily
repaired, to extensive
ripping of the tube or stretch areas
which may make repairs exceedingly difficult
or
actually impossible. The determination of just where this division between repairable and unrepairable
damage
exists will depend upon
the careful judgment
of the inspector.
For this reason, we recommend
contacting the B.F.
Goodrich Company
at Akron, Ohio.
14-53.
INSTALLATION. The
following procedure
for installing deicers
assumes that the airplane
has
provisions
for air
connections,
etc.
NOTE
Balance
stabilator
per instructions
in Section
IV of this manual.
14-54. PREPARATION
OF LEADING
EDGES. If the leading
edges are painted,
remove all paint
including
zinc chromate
primer.
a. With
one inch (1)
masking tape,
mask off leading
edge boot
area, following
1/2 inch margin
for
non-recessed boots.
Take care to mask
accurately, thus eliminating
the need for cleaning
off excess cement
later.
b. Clean the metal surfaces thoroughly,
at least twice, with MEK or Acetone.
For final cleaning,
wipe the solvent film off quickly with
a clean, dry cloth before it has time to dry.
NOTE
It is
permissible to
install deicers
on alodined or
anodized surfaces.
c. Fill gaps of skin
splices that lead under deicers with
sealing compound EC-801.
d. Remove
the sump
plugs from the
air connection
grommets. In
some cases.
it will be necessary
to
remove
sections of doped fabric
used to cover the air
connection holes. Draw
out the ends of the non-kink
hose
section so that they
protrude through the
connection holes in the
leading edge. If hose
is cracked or de-
teriorated. replace with new hose.
14-55. PREPARATION
OF DEICER.
Moisten a clean
cloth with MEK or Acetone
and carefully clean
the
rough,
back surface of the boot at least twice. Change
cloths frequently to avoid recontamination
of the
cleaned areas.
14-56.
MOUNTING DEICER
ON LEADING
EDGE. Thoroughly
mix EC-1403 cement
before using.
Apply
one even brush coat
to the cleaned back
surface of the boot and
to the cleaned metal
surface. Allow
the cement to air
dry for a minimum of
one hour. Apply a second
coat to both surfaces
and allow to air dry
a
minimum of one hour.
Ambient temperature
for installation should
be held between 40°
and 110 F.
However,
longer drying time
of the cement coats may
be required as the
humidity approaches 99%.
Deicer
and leading edge may be cemented for a
maximum of 48 hours before actual installation,
if cemented parts
are
covered and
kept clean.
Snap a chalk line along
the leading edge
of the airfoil section.
Intensify chalk line on
leading edge and
the white reference line
on the boot with a ball point pen. Most boots
are made with an excess of material
at the inboard and outboard edges for final trimming after installation and some recessed boots trim on the
upper and lower edges.
Securely
attach hose to deicer connections
using clamps or safety
wire.
Reissued:
10/11/79
ACCESSORIES
AND
UTILTIES
3C2
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