TM 10-1670-201-23
T.O. 13C-1-41
NAVAIR 13-1-17
(1) Lay out the parachute canopy with the
(4) Using an authorized marking aid of
damaged area exposed.
contrasting color, mark a square, triangle, or rectangle,
as applicable, around the damaged area.
(2) To facilitate the application of the
mending cloth patch a 1/2- by 20-inch smooth wooden
(5) Measure and cut lengths of the mending
board or similar smooth, hard-finished, rigid material,
cloth to achieve the shape and size of the intended
except paper board, under the damaged area.
patch. Cut the patch to provide an overlap of the
damaged area using the specifics in table 3-2. Round
(3) Trim the ragged, frayed, or severely
off patch corners. Patches will be prepared in duplicate
burned areas of the canopy cloth to provide a smooth
to allow for application on the inside and the outside of
area for patch application.
the canopy.
Table 3-2. Mending Cloth Patching Specifications for Cargo Parachutes.
Damaged area size
Patch minimum size
1 inch to 1 1/2 inches
2 inches
1 1/2 inches to 2 inches
3 1/2 inches
2 inches to 3 inches
4 1/2 inches
3 inches to 5 inches
9 inches
5 inches to 7 inches
10 inches
7 inches to 12 inches
15 1/2 inches
12 inches to 15 1/2 inches
19 1/2 inches
Further application of this patching method to other
(6) Remove the paper backing from the
parachute canopies or airdrop equipment is prohibited
adhesive side of the mending cloth by forming a crease,
unless exception is provided in a specific item
scoring the paper with a fingernail, and peeling the
equipment publication. Patching limitations will be in
paper from the adhesive coating. Insure the mending
accordance with paragraph 3-12. A complete canopy
cloth is not damaged when scoring the paper backing.
section replacement will be performed when an
(7) Smooth the canopy material adjacent to
individual section has been patched extensively with the
the damaged area on the canopy outside and place the
pressure-sensitive patch material and an apparent
formed mending cloth patch over the damaged area.
stiffening of the section occurs. The stiffening effect
(8) Using the edge of a packing paddle or a
may adversely affect the proper layout and packing of a
roller, apply pressure to smooth the patch on.
parachute canopy. Apply a pressure-sensitive (iron-on)
(9) Apply the duplicate-shaped patch to the
patch as follows:
damaged area on the canopy inside using the
(1) Place the canopy on a work table and
procedures in (6) and (7) above.
smooth all wrinkles from the material surrounding the
(10) Restencil gore section data, as required,
damaged area.
in an area adjacent to the patched area according to
(2) Cut a piece of pressure sensitive-coated
procedures in paragraph 3-5.
cotton balloon cloth large enough to extend 1 inch
c. The Pressure-Sensitive (Iron-on) Patch. A third
beyond all edges of the damaged area. If the damaged
method of applying a basic patch is a heat and pressure
area extends to a point within 1 inch of the upper lateral
(iron-on) technique using pressure-sensitive-coated
band, only a sewn patch as outlined in paragraph a
balloon cloth. This method is limited to use on the
above will be allowed.
cotton muslin canopies of the G-14, G-13, and the 12-
and 26-foot-diameter high-velocity cargo parachutes,
Change 7 3-9
