TM 10-1670-296-20&P                                                    0005 00 0005 00-20 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: 29 Type IV Drive-Off Aid.   Inspect drive-off aid (1) for loose or broken stitching, frayed webbing, or foreign material.  Refer to WP 0038 00. Drive-off aid has loose or broken stitching or frayed webbing.  Foreign material is present. 30 Aircraft Cargo Tie-down.   Inspect tie-down chain (1) for weak links, rough areas, bends, breaks, cracks, rust, or foreign material.  Ensure turnbuckle threads (2) are not stripped or damaged.  Refer to WP 0039 00. Tie-down chain (1) has weak links, rough areas, bends, breaks, or cracks.  Rust, or foreign material is present.   Turnbuckle threads are stripped or damaged.