Removal Of Deicer; Blade Preparation; Cement Application 2I12 - Piper PA-32R-301 SARATOGA SP Maintenance Manual

PROPELLER DEICING SYTEM (Cont.)
H. DEICER BLADES (Cont.)

(4) REMOVAL OF DEICER

(a) Disconnect terminals of propeller deicer from studs on spinner bulkhead.
(b) Use MEK or Toluol to soften adhesion line between deicer and propeller blade.
(c) Starting at one corner of deicer, loosen enough of deicer to grasp in jaws of a vise grip pliers
or similar tool.
(d) Apply a steady pull on deicer to pull it off propeller surface. Continue using MEK or Toluol
to soften adhesion lines. Unless deicer being removed is damaged and is to be scrapped,
cushion jaws of any pulling tool used to prevent damage to deicer surface. Remove very
slowly and carefully. If deicer has failed and is to be returned under request for warranty,
extreme care should be exercised so that no additional damage is incurred to deicer during
and after removal.
(e) Remove residual cement from blade. Use Turco 3 or equivalent to help remove dried
cements.

(5) BLADE PREPARATION

(a) Mark and cut from masking tape a pattern size of propeller deicer including first inch of lead
strap. (Refer to figure 14.)
(b) Place a mark at hub end of blade in line with blade leading edge. Location for this mark can
be determined by sighting along leading edge. Starting at hub (see NOTE below), center
pattern on this mark and stick pattern to leading edge. Mark position of deicr lead strap
where it crosses hub.
All deicers on a single propeller must be located same distance
from hub for rotational balance.
(c) Remove pattern and remove any paint in marked off area. Clean down to bare metal. Next,
clean area thoroughly with MEK or acetone. For final cleaning, wipe solvent off quickly with
a clean, dry lint- free cloth to avoid leaving a film.
Cleanliness of metal and rubber parts cannot be too highly stressed.
Only perfectly clean surfaces will assure maximum adhesion.
(d) Using a pencil or pen, mark a centerline at hub of propeller blade and on tape at outboard
edge of masked area.
(6) CEMENT APPLICATION
(a) Using a silver pencil, mark a centerline on glossy side of deicer.
(2) Moisten a clean cloth with MEK or acetone and clean unglazed surface of deicer, changing
cloth frequently to avoid contamination of clean area.
(c) Thoroughly mix 1300L cement. Apply one even brush coat of cement to unglazed back sur-
face of deicer. Cement one inch of deicer lead strap. Allow to air dry for a minimum of one
hour at 40°F or above, when relative humidity is less than 75%. If humidity is 75% to 90%,
allow two hours drying time. Do not apply cement if relative humidity is higher than 90%.
After allowing proper amount of drying time, apply a second even brush coat of 1300L
cement.
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
– NOTE –
– CAUTION –
2I12
30-60-00
Page 30-42
Reissued: July 1, 1993