TM 10-1670-296-20&P                                                    0006 00 0006 00-13 Table 2.  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: 22 Multi-Knife Parachute Release Strap.  Inspect strap for loose or broken stitching, cuts, worn and frayed webbing, or presence of foreign material.   Check knives for rough areas, bends, breaks, and cracks and knife-edges for sharpness.   Ensure that ferrules operate properly. Strap has loose or broken stitching, cuts, worn or frayed webbing, or foreign material is present.  A knife has rough areas, bends, breaks, or cracks or its edge is dull.  A ferrule does not cover the safety aperture when unscrewed to the full open position. 24 3-Point Coupling Link Assembly.  Inspect three-point link for rough areas, bends, breaks, and cracks.  Ensure fastener threads are not stripped or damaged. Link has rough areas, bends, breaks, and cracks.  Fasteners have stripped or damaged threads.