TM 10-1670-292-23&P                                                       0028 00 UNIT MAINTENANCE MC1-1C/MC1-1D TROOP BACK PARACHUTE ASSEMBLY   RISERS 0028 00-1 THIS TASK COVERS: = Repair = Replace INITIAL SETUP: Equipment Condition Unpacked. Tools Knife (Item 13, WP 0042 00) Knife, Hot Metal (Item 14, WP 0042 00) Separator, Connector Link (Item 27,   WP 0042 00) Screwdriver, Flat-tip (Item 26, WP 0042 00) Sewing Machine, Medium-Duty (Table 1, WP 0012 00) Shears (Item 28, WP 0042 00) Personnel Required 92R(10) Parachute Rigger Materials/ Parts Reefing Ring, Control Line (Item 32,   WP 0055 00) Tape, Adhesive,¹/₂-Inch, Pressure Sensitive, Blue (Item 37,  WP 0055 00) Tape, Nylon, Type III, 1½-inch-wide (Item 43, WP 0055 00) Thread, Nylon, Size E (Item 49/52, WP 0055 00) Webbing, Nylon, Type I, ⁹/₁₆-inch wide (Item 62, WP 0055 00) References Group No. 02, MAC (WP 0046 00);WP 0003 00   WP 0012 00, Tables 1 and 2 REPAIR Repair a damaged riser assembly a follows: 1.    Repairing a guide ring and a guide ring-retaining strap.  Repair is limited to replace.  Replace a damaged or missing guide ring and guide ring retaining strap as follows: a.    If applicable, remove the original guide ring, and guide ring-retaining strap, from the riser by cutting the stitching securing the strap to the riser.  Ensure the riser webbing is not damaged during the cutting process. b.    If required, replace the guide ring (reefing ring) with a serviceable item from stock. c.    Cut a 4½-inch length of ⁹/₁₆-inch-wide, type I, nylon webbing; sear the ends. d.    Fold the webbing and install a serviceable guide ring on the folded webbing according to the details illustrated on the next page.