DIRECT SUPPORT MAINTENANCE
MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM
GENERAL REPAIR PROCEDURES
THIS TASK COVERS:
Basting and Temporary Tacking
Stitching and Restitching
Unpacked. Canopy with defects recorded. Clean.
Specified in paragraph applicable to the item being repaired.
92R(10) Parachute Rigger
Specified in paragraph applicable to
the item being repaired.
Sewing requirements will vary according to the type of item being
repaired and the type of repair being made. The type of sewing
machine, type of thread, the stitch range, and the stitch pattern (if
applicable) required to accomplish a sewing procedure will be
specified in the paragraph applicable to the item being repaired.
Immediately after the accomplishment of a machine sewing
procedure, trim thread ends to a point as close as possible to the
material that has been sewn.
Repair and replacement of parachute components is performed in
accordance with the repair instruction in this section and in specific
paragraphs applicable to the item being repaired.
BASTING AND TEMPORARY TACKING
Basting and temporary tacking are hand-sewing methods used to temporarily hold layers of cloth fabric
together while a repair is being performed. The following is a list of procedures that apply to basting and
temporary tacking actions:
1. Basting and temporary tacking should be made using thread that is of a contrasting color to the
material being worked.
2. Basting and temporary tacking will be performed using a single strand of size A, nylon thread, or
ticket No. 24/4 cotton thread.
3. When basting, do not tie knots at any point in the thread length. Also, the sewing should be made
with two (2) stitches per inch.
4. Immediately upon completion of a repair, remove previously made basting or temporary tacking.