0040 00  TM 10-1670-287-23&P  UNIT MAINTENANCE  MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM  MAIN RIPCORD POCKET  THIS TASK COVERS:  INITIAL SETUP:  Tools Personnel Required  Equipment Condition  Materials/Parts  Follow-Up Procedure  REPAIR REPLACE 0040 00-1  1.  Carefully remove stitching (straight and zig-zag) attaching main ripcord pocket to container. Remove  unserviceable pocket.  Replace an unserviceable main ripcord pocket as follows:  Main ripcord pocket repair is limited to restitching. Restitch over original stitch pattern using size E nylon  thread, and 7 to 11 stitches per inch.  Pocket, Main Ripcord (Item 23, WP 0071 00)  Thread, Nylon, Size E (Item 43/44, WP 0076 00) Ripcord Pin Pull-Force Check (WP 0014 00). Lay out on packing table or other suitable  area. Main ripcord and main canopy release  ripcord removed.  Sewing Machine, Bartack (Table 1, WP 0015 00)  Sewing Machine, Light-Duty (Table 1, WP 0015 00)  Sewing Machine, Zig-Zag (Table 1, WP 0015 00)  Shears (Item 39, WP 0063 00)  Stitch Removal Tool (Item 40, WP 0063 00)  92R (10) Parachute Rigger  x Repair  x Replace  Zig-Zag or Bartack  Stitching  Straight Stitching