Radome Boot; 1H14; List Of Materials; Preparation And Installation Of Radome Boot - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
4-107. RADOME BOOT.
4-108. LIST OF MATERIALS.
1.
Radome Boot - 3M No. SJ-8665 FP-23.
2. Marking pen.
3. Sponge or spray bottle.
4. Isopropyl alcohol.
5.
Wetting solution: 25% isopropyl alcohol, 75% water, plus 1 teaspoon of liquid detergent (Ivory.
Joy) per gallon of solution.
6. 3M PA-1 plastic squeeze or equivalent.
7. Masking tape - ½" wide.
8. Industrial razor blade knife.
4-109. PREPARATION
AND INSTALLATION OF RADOME BOOT.
a. Thoroughly wash repair, primed radome with isopropyl alcohol and wipe dry
b.
Use a marking pen to place an orientation mark (+) on the top center of radome surface.
c. Position boot. with protective liner still in place, over radome.
1. Rotate to determine optimum fit.
2. On the top center of the boot surface, use a marking pen to trace over the orientation mark (+).
3. Add a vertical orientation mark overlapping the bottom of the boot onto the side of the
radome.
d. Turn boot inside out and place over radome (disregard orientation marks).
1. Carefully remove transparency protective liner. Saturate the exposed adhesive surface with
wetting solution as the liner is being removed to prevent adhesive to adhesive contact. (A sponge or spray
bottle can be used.)
2. After the liner has been removed, make sure that the entire adhesive surface has been saturated
with wetting solution.
3. Remove boot.
4. Now. completely saturate the radome surface with wetting solution.
e. Place the boot over the radome (adhesive side to radome) carefully aligning the orientation marks.
During this step, the boot will be right side in.
f. After proper alignment has been made. squeeze out wetting solution, starting at the top center and
working out and down. Care should be taken to avoid blisters under the boot.
g. If after application of the boot, there appears to be blisters beneath the surface, piercing them with
an ordinary safety pin will relieve the entrapped air or wetting solution so that the blister can be worked out
with the squeegee.
h.
Wrap the outside circumference of the boot with 1 2" wide masking tape at the desired location.
Trim boot with an industrial razor blade knife being careful not to cut into the radome skin surface.
i. Wash boot with isopropyl alcohol, wipe dry and paint with a suitable polyurethane paint system.
4-110 INSPECTION OF RADOME BOOT.
a. Inspect for cuts. blisters, perforations. edge lifting, etc. every 100 hours.
b. The boot should be replaced at the first sign of damage.
Added: 11/15/82
STRUCTURES
1H14