TM 10-1670-296-20&P                                                    0005 00 0005 00-16 Table 1.  Preventive Maintenance Checks and Services – continued B – Before D – During A – After INTERVAL ITEM NO. B D A ITEM TO BE CHECKED   OR SERVICED EQUIPMENT NOT READY/ AVAILABLE IF: 21 Single Knife Parachute Release Strap.  Inspect strap (1) for loose or broken stitching, cuts, worn and frayed webbing, or presence of foreign material.   Check knife (2) and fastener (3) for rough areas, bends, breaks, and cracks.  Check knife edge (4) for sharpness.  Ensure that ferrule (5) operates properly.   Refer to WP 0030 00. Strap (1) has loose or broken stitching, cuts, worn or frayed webbing, or foreign material is present.  Knife (2) or fastener (3) has rough areas, bends, breaks, or cracks.  Knife edge (4) is dull.  Ferrule (5) does not cover the safety aperture (6) when unscrewed to the full open position. 22 Multi-Knife Parachute Release Strap.  Inspect strap (1) for loose or broken stitching, cuts, worn and frayed webbing, or presence of foreign material.   Check knives (2) for rough areas, bends, breaks and cracks, and knife edges (3) for sharpness.  Ensure that ferrules (4) operate properly.  Refer to WP 0031 00. Strap (1) has loose or broken stitching, cuts, worn or frayed webbing, or foreign material is present.  A knife (2) has rough areas, bends, breaks, or cracks or its edge (3) is dull.  A ferrule (4) does not cover the safety aperture (5) when unscrewed to the full open position.