Radome Erosion Shield; List Of Materials - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
4-111. RADOME EROSION SHIELD.
4-112. LIST OF MATERIALS.
1. Cement. - Minnesota Mining and Manufacturing Co. EC-1403 or 1300 L. (Approximate
coverage
80 sq. ft. per quart mixed.)
2. Scissors - 2" blades with pointed tips.
3. Solvents - Toluol for tackifying (See Note). Methyl Ethyl Ketone (MEK) cement thinner and
cleaning solvent.
4. Cloth - clean and lint-free.
5. Paint brushes - one 1 1/2" or 2" and one 1/2".
6. Sponge roller - 2".
7. Oil can - 3 or 4 oz. dirt and oil free.
8.
Masking tape - 1/2" and 1" widths.
9. Flexible straight edge.
10. Hypodermic needle - 22 ga.
11 Steel stitcher roller - 1/8".
12. "V" knife.
NOTE
MEK (Methyl
Ethyl Ketone) can be used instead of Toluol to
activate cement.
However. MEK causes very rapid drying and
provides only 10 seconds working time for application
compared
with 40 seconds for Toluol.
4-113. PRE-INSTALLATION INSTRUCTIONS
FOR RADOME EROSION
SHIELD.
a. Ambient temperature for installation
should be between 40°F and 110°F. Humidity must be below
99% during installation. Longer drying time of cement coats may be required as humidity approaches
99%.
b EC 1403 cement is normally used as received. However, erosion shields with a tapered trailingedge
or shields with a gauge of less than .060 should be installed with cement diluted with one part MEK to two parts
cement for smoother. neater installation.
c. Use only clean. lint-free cloths for cleaning and activating cement coats.
d. Apply cement coats evenly and uniformly.
e. Cement has reached "proper tack" when it looses "webbiness" and, when touched with back of a
finger knuckle. feels sticky but will not pull loose.
4-114. PREPARATION
AND INSTALLATION OF RADOME EROSION SHIELD.
a. All paint must be removed by using appropriate
paint remover or by sanding. (Epoxy-based
paint
need only be roughened.) Any holes or dents in the structure must be filled with the appropriate
repair material
and sanded. Clean the area to be covered, using MEK or equivalent.
b. Dry fit the erosion shield to the cleaned structure. Position identified "top" surface of erosion shield
on top surface of structure. Then adjust each side to provide equal distance from structure attachment
line.
Smooth
out any wrinkles. Apply 1/2" wide masking tape to the structure.
next to the shield's trailing edge.
(Refer to Figure 4-39. View 1.)
c. Establish a reference line at the top and draw a pencil mark on the masking tape to correspond with
the center line mark on the inside of the erosion shield. Repeat at bottom and remove erosion shield from
structure.
(Refer to Figure 4-39. View 2.)
Added: 3/14/83
1H15
STRUCTURES
1H15