APPENDIX I GLOSSARY

APPENDIX I GLOSSARY ABRASION—A fuzzy spot or area on cloth, usually caused by rubbing against an object. ACC—Abbreviation for aircrew systems change. ACCORDLAN-FOLDS—Folding a canopy into S-shaped layers of predetermined size. Accordian folding produces a packaged parachute assembly in the desired finished shape. ACID—A fundamental chemical class distinguished by having reactive hydrogen radicals (pH below 7.0). Acids can be extremely corrosive to metal and damaging to fabric. ADAPTER, HARNESS—A rectangular metal fitting with a fixed crossbar used primarily as an anchoring point. ADAPTER, HARNESS FRICTION—A rectangular metal fitting with a movable center bar (friction grip). Facilitates quick adjustment of a harness by the wearer. AIRCREW MEMBER—An aircraft crew member. Passengers are not considered aircrew members. ALKALINE—A substance that is opposite to an acid, a base. Also, any substance that has the properties of an alkali (metallic hydroxide). ANEROID—A corrugated metal capsule used in the automatic parachute ripcord release for sensing atmospheric pressure. The aneroid will initiate operation of an actuator at a preset altitude. ANTI-SEIZE TAPE—A tape of any of several thin plastic-film materials (such as tetrafluoroethylene) characterized by a waxy, oily texture, and used to prevent binding between mating surfaces of threaded parts when applied to the male threaded portion. APPROX—Abbreviation for approximately. ASSEMBLY—A grouping of parts fitted together to form a complete unit. ATMOSPHERIC PRESSURE—Pressure at sea level, expressed as 14.696 pounds per square inch, absolute, or 29.92 inches mercury column (barometer). See also PSIA and IN. HG. AUTOMATIC PARACHUTE RIPCORD RELEASE—A barometrically controlled device that mechanically or by explosive force actuates the parachute ripcord assembly, causing the parachute container to open at a preset altitude. AWL—A pointed tool for piercing small holes in cloth, leather, wood, and other soft materials. BACKSTITCH—A stitch made by inserting the needle a stitch length to the right and bringing it up an equal distance to the left. Also, sewing back over a row of stitches. BAG, SHOT—A bag filled with lead shot used to hold the canopy in place during packing. BAG, DEPLOYMENT—A canvas enclosure for the canopy and suspension lines. In use, the deployment bag controls release of suspension lines and canopy, ensuring orderly opening. BALL, CABLE RETAINING—A steel ball that is swaged to the ripcord cable and secures the ripcord handle to the cable. BAND, LATERAL—Webbing inserted in canopy skirt and vent hems to reinforce edges and distribute load. BAND, POCKET—A piece of tape or line attached at the skirt hem and across the radial seam, which causes the gores to be pulled outward AI-1