0042 00  TM 10-1670-287-23&P  UNIT MAINTENANCE  MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM  MAIN CANOPY RELEASE RIPCORD AND HOUSING  THIS TASK COVERS:  INITIAL SETUP:  Tools Materials/Parts  Personnel Required  Equipment Condition  REPLACE 1. Pull main release ripcord from its keeper and remove ripcord from housings.  x Replace  92R (10) Parachute Rigger  Lay out on packing table or other  suitable area.  Housing, Main Release, Long (Item 20 WP 0071 00)  Housing, Main Release, Short (Item 24, WP 0071 00)  Tape, Lacing and Tying (Item 33, WP 0076 00) Needle, Tacking (Item 29, WP 0063 00)  Shears (Item 39, WP 0063 00)  Tape Measure (Item 42, WP 0063 00)  2. Carefully cut and remove tacking securing housings in harness keeper.  3. Remove short housing from keeper.  Riser Rings  Base Ring  Main Canopy  Release Ripcord 0042 00-1 