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11236 Satellite Blvd. Orlando, FL 32837 Tel.: (407) 859-9317 Fax: (407) 850-6978 www.strongparachutes.com
Strong Enterprises Owner’s Manual. Dual Hawk Tandem System -
Revision L: 1/16
3.4 Repair Guidelines
When possible, stitching and re-stitching on parachute items should be made with thread that
matches the color of the original stitching. All straight stitching should be 7-11 stitches per inch,
and locked by over stitching the existing stitching by at least 2-inches. Zigzag should extend at
least 1/2-inch into undamaged stitching at each end. Re-stitching should be made directly over
the original stitching, following the original stitch pattern as closely as possible. All thread on the
canopy should conform to Mil Spec A-A-59826, Size E, and be applied with a light or medium duty
machine.
3.4.1 Harness/Container
Any portion of the harness that is structurally damaged should be replaced in a manner
to duplicate the original. Container repairs authorized are standard single side patches or
replacement of the damaged area.
3.4.2 Main Canopy
Any holes or tears in the canopy fabric should be patched with a single side patch using a French
fell seam.
Type of Repair
Limitations
Re-stitching:
No limit as to length or number
Patch, single side:
Size limit: Maximum 50% of cell surface
Limit of 2 per cell
Cell replacement:
Factory replacement only
Reinforcement tape replacement: Factory replacement only
Suspension line replacement:
No limit (See Appendix A for dimensions)
3.4.3 Reserve Canopy
If any holes, tears, or burrs are detected or if suspension lines are out of trim return canopy to
factory or authorized recertification center for complete inspection and evaluation.
3.4.4 Drogue
Unlimited re-stitching. Single side patch maximum of 50% of panel or mesh. Anything more,
replace.
