0015 00  TM 10-1670-287-23&P  UNIT MAINTENANCE  MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM  GENERAL REPAIR PROCEDURES  THIS TASK COVERS:  INITIAL SETUP:  Equipment Condition Tools Personnel Required  Materials/ Parts  NOTE NOTE BASTING AND TEMPORARY TACKING  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. 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.  92R(10) Parachute Rigger  Specified in paragraph applicable to the  item being repaired. Unpacked. Canopy with defects recorded. Clean.  Specified in paragraph applicable to the item being  repaired. •  Zig-Zag Sewing  •  Patching •  Basting and Temporary Tacking  •  Stitching and Restitching •  Darning 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 stitches per inch.  4.  Immediately upon completion of a repair, remove previously made basting or 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:  Change 1  0015 00-1 