Piper SEMINOLE PA-44-180, Maintenance Manual

Page: 370 / 881

4. From the center line of the leading edge to the lower trailing edge of the deicer, use the pressure handle
squirt can to soften the bond between the deicer and the wing skin.
5. Use Kelite 21 or Turco 388 to clean the dry cement off the exposed wing area and clean the area thoroughly
with MEK (MethylEthylKetone).
REPAIR OF BOOTS.
Deicer repairs are classified as cold repairs (temporary), which are made with the boot installed on the airplane,
and vulcanized repairs, which are made on the demounted boot in the shop. (Refer to the appropriate paragraph
for vulcanized repairs.)
COLD REPAIR.
The materials and supplies for making cold repairs are listed in Chart 3003.
1. SCUFF DAMAGE. This type of damage will be most commonly encountered and, fortunately, it is not
necessary in most cases to make a repair. On those rare occasions when the scuff is severe and has caused
the removal of the entire thickness of surface ply in spots (the brown natural rubber underneath is exposed),
repair the damage using Part No. 74-451-16 and proceed as follows:
A.
Clean the area around the damage with a cloth dampened slightly with solvent. Buff the area around
the damage with steel wool so that it is moderately but completely roughened. Wipe the buffed area
with a clean cloth slightly dampened with solvent to remove all loose particles.
B. Select a patch of ample size to cover the damaged area. Apply one even thorough coat of cement, Part
No. 74-451-20, to the patch and the corresponding damaged area. Allow cement to set a couple of
minutes until tacky.
C. Apply the patch to the deicer with an edge, or the center adhering first. Work down the remainder of
the patch carefully to avoid trapping air pockets. Thoroughly roll the patch with stitcher-roller, Part
No. 74-451-73, and allow to set for ten to fifteen minutes.
D. Wipe the patch and surrounding area from the center outward with a cloth slightly dampened with
solvent. Apply one light coat of A-56-B conductive cement, Part No. 74-451-11, to the patched area.
E. Satisfactory adhesion of patch to deicer will be reached in four hours. Deicer may be inflated for
checking repair in a minimum of 20 minutes.
2. TUBE AREA DAMAGE. Repair cuts, tears, or ruptures to the tube area with fabric reinforced patches, Part
No. 74-451-16, depending on size of damage.
— Note —
These patches are manufactured so that they will stretch in one direction only. Be sure
to cut and apply the patch selected so that stretch is in the widthwise direction of the
inflatable tubes.
A. Select a patch of ample size to cover the damage and to extend to at least 5/8 inch beyond the ends and
edges of the cut or tear. If none of the patches is of proper size, cut one to the size desired from one of
the larger patches. If this is done, bevel the edges by cutting with the shears at an angle.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
3 0 - 1 3 - 0 7
Page 30-10
Revised: May 15, 1989
2D14
PIPER AIRCRAFT