•  Description: Replacement of damaged or missing  3-ring release housings 1.  Locate the new BOC pocket on the container at the  marks of the old pocket and pin in place with T-pins.  [Figure B] •  Authorized repairmen: FAA Senior or Master  Parachute Rigger  •  Materials: Nylon supertack, 3-ring housings of the  correct length, heat shrink tubing - ½ inch diameter,  Owner’s Manual for the harness and container  assembly (if available) •  Machines: None •  Equipment: Scissors, seam ripper or scalpel, marking  pencil, 6-inch ruler, hand tacking needle, heat gun,  crimping tool (optional) 2.  Stitch around the perimeter of the pocket with the  single-needle machine. Backstitch at the corners for  reinforcing.  [Figure C] 1.  Inspect the original installation to determine the exact  routing of the housings. Some systems have dedicated  channels and/or loops through which they are routed.  In others, the housings are routed under or over back  straps or reserve ripcord housings. If necessary, draw  a diagram of the routing or take a picture so that the  replacement housings are routed correctly. 2.  Remove any tackings or clamps that hold the housings  together and/or to the container. Remove the housings  from the system. Reassembly Procedure Disassembly Reassembly Replacement of the 3-ring housings may be necessary due  to wear, damage, or stretching of the housings. Correct  installation and tacking of the housings are important to  ensure proper operation of the 3-ring release system. Inspection Ring Release Housing Replacement 1.  Install the replacement housings into their respective  locations as per the original installation. Usually the  longer housing is installed first and then the shorter one. 2.  Make sure that the flat side of the housing terminal  end is orientated outward so that it lays flat against  the rear of the main riser when the 3-ring release is  assembled correctly.  [Figure A] 3.  Align the handle end of the housings and secure as  per the original installation. This may be with either  a double clamp or hand tacking.  [Figure B] Figure C shows a typical method of using supertack to secure  the housings together. 4.  If hand tacking is used, it is desirable to cover the  tacking with heat shrink tubing. Place a length of  tubing over the housing ends and shrink using the heat  gun.  [Figure D] 3.  Restitch the corner of the main container as per the  original configuration. •  Check the orientation of the pocket with the opening  to the right (unless for left-handed deployment). •  Check the stitching and corner reinforcing. •  Applicable products: All harness and container  systems equipped with a 3-ring release system 7-49