Deicer Boot Preparation; Mounting Boot On Leading Edge - Piper PA-44-180 SEMINOLE Maintenance Manual

PREPARATION OF DEICER BOOT.
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.

MOUNTING BOOT 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.
1. Holding the backside of the boot close to the leading edge, fasten the end of each non-kink hose to the
corresponding air connection stem. Tinnerman or other suitable non-kink hose clamps should be used for
this purpose. Tighten each clamp with a pair of slip joint pliers but do not squeeze the clamp so tight that t
he hose is damaged.
If non-kink hose clamps are not available, wrap each hose connection with several
turns of friction tape. Over the tape, wrap two separate bindings of safety wire, about
1/2 inch apart. Each of these bindings should consist of several turns of wire. Twist
together the ends of each binding to tighten. Press the twisted ends down against the
hose. Finally, wrap the wire with several additional turns of friction tape.
2. Push the hose connections into the leading edge grommets or seals as the case may be. Obtain sufficient
personnel to hold boot steady during installation. (Limit handling cemented side of boot with fingers.)
Continue installation by reactivating the cement along the center line leading edge surface and boot in span
wise strips approximately six inches wide. Rubber roll the deicer firmly against the wing leading edge,
being careful not to trap any air under the deicer. Always roll parallel to the inflatable tubes. Position the
deicer center line to coincide with leading edge center line. Hold boot in this position while reactivating
about three inches around connections and around corresponding holes in leading edge, using a clean, lint-
free cloth moistened with Toluol. Insert connections in leading edge holes when cement has dried to a tacky
state and rubber roll boot to leading edge in tackified area.
3. If the deicer should attach "off course," use MEK to remove and reposition properly. Avoid twisting or
sharp bending of the deicer.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— Note —
2D20
3 0 - 1 3 - 1 2
Page 30-16
Revised: May 15, 1989