ARMY TM 10-1670-282-23&P
AIR FORCE T.O. 13C530-2
NAVY NAVAIR 13-1-33
2-24.
Gore Panel (Upper and Lower) (cont).
(c)
Pressure-sensitive (iron-on) patch. This method of applying a basic patch is a heat and pressure
(iron-on) technique using pressure-sensitive-coated cotton balloon cloth. This method is limited to use on the cotton
muslin canopies such as the 34-foot cargo parachute. A complete gore panel replacement will be performed when an
individual panel has been patched extensively with the pressure-sensitive patch material and an apparent stiffening of the
panel occurs. The stiffening effect may adversely affect the proper layout and packing of a parachute canopy. Apply a
pressure-sensitive (iron-on) patch as follows:
1
Smooth all wrinkles from material surrounding the damaged area.
2
Cut a piece of pressure-sensitive-coated cotton balloon cloth large enough to extend 1 inch
beyond all edges of the damaged area. If damaged area extends to a point within 1 inch of
upper lateral band, only a sewn patch as outlined in (b), above, will be allowed.
3
Place coated cloth patch over damaged area with adhesive side facing down. If damaged
area has no material missing, patch will be applied to the inside of canopy only. Whenever
damaged area has a space between the edges of material which indicates that material is
missing, patch will be applied to both inside and outside of canopy (figure 2-45).
4
Using a household-type electric iron with heat regulated for cotton material, apply heat and
pressure simultaneously to patch material for at least 30 seconds. Insure that all of patch
material is subjected to heat and pressure, and that all edges of patch have adhered to
canopy material. Also insure that temperature of iron remains constant during patch
application effort and that no other part of canopy is underneath area being patched.
(4)
Restenciling. As required, restencil identification markings using procedures in paragraph 2-19.
b.
Replace. Replace an upper or lower gore panel which is damaged beyond repair as follows:
(1)
Invert the canopy to locate the inside of the damaged panel to the outside and place the canopy on a
repair table.
(2)
Secure each of the adjacent radial tapes, the vent or skirt reinforcement, as applicable, and the upper or
lower annular ring reinforcement, as applicable, to the table with pushpins.
(3)
Remove the affected panel by cutting the panel material at a point within 1/2 inch of the inside edge of
each radial tape, the vent or skirt reinforcement (upper or lower lateral band), as applicable, and the
applicable annular ring reinforcement.
(4) Make a 1/2-inch foldback on each of the inside cut edges and baste each foldback according to the
basting procedures outlined in para. 2-17.
(5)
Cut a piece of type III 3.8-ounce cotton muslin cloth according to the applicable details in figure 2-46 and
place the cloth in the original panel location.
2-70
