Blade Preparation - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
e.
Use liberal amount of Toluol to soften adhesion line between de-icer and propeller blade. Starting
at one corner. loosen enough of the de-icer to grasp in the jaws of a vise grip or similar tool. Apply a steady
pull to remove de-icer from propeller surface slowly and carefully while continuing to use a liberal amount of
Toluol to soften adhesion line.
CAUTION
Do not allow solvents to leak into propeller hub and cause damage
to seals.
f.
Remove residual cement from blade. Use Toluol or Turco No. 3 or equivalent to help with dried
cements.
g.
Using a 10x magnifying glass. visually inspect (used) propeller blades for damage or deterioration
prior to installing new deicers.
14-47. BLADE PREPARATION.
a.
Mark and cut from masking tape a pattern the size of the propeller deicer including the first inch of
the lead strap. (Refer to Figure 14-17.)
b.
Place a mark at the hub end of the blade in line with the blade leading edge. The location for this
mark can be determined by sighting along the leading edge. Starting at the hub (see NOTE below). center
the pattern on this mark and stick the pattern to the leading edge. Mark the position of the deicer lead strap
where it crosses the hub.
NOTE
All deicers on a single propeller must be located the same distance
from the hub for rotational balance.
I
c.
Remoxe the pattern and remove any paint in the marked off area. Clean down to bare metal.
Next. clean the area thoroughly with MEK or acetone. For final cleaning. wipe the solvent off quicklY with
a clean dry lint-free cloth to avoid leaving a film.
CAUTION
Cleanliness of metal and rubber parts
stressed. Only perfectly clean surfaces
adhesion.
d.
Using a pencil or pen. mark a centerline at the hub
outboard edge of the masked area.
Revised: 10/15/82
4F1
cannot be too highly
will assure maximum
of the propeller blade and on the tape at the
ACCESSORIES AND UTILITIES