and Packing > Inspection
Chute and Bridle > Reserve Canopy
If available, use a canopy damage chart appropriate
to the canopy for documenting your inspection for repair of
any damage found. Figure 5-10 shows a typical chart for round
Figure 5-10. Round canopy damage chart.
1. Check the apex lines for damage and continuity
as well as the upper lateral band. If there is a tension loop,
make sure it is secure. If there is a vent collar ring, check
the elasticity of the material.
2. Inspect gores and panel fabrics by starting at the top center
gore of the canopy, working your way up one gore while inspecting
the fabric, seams, tapes, and lines. When you reach the apex,
pull the next radial seam toward you, stretching out the fabric,
and work your way down the gore to the lower lateral band. [Figure
5-11 on page 5-8] This method is the most efficient use of your
time and physical efforts. Work your way around the canopy,
inspecting each gore from top to bottom.
Figure 5-11. Round canopy gore inspection.
3. The manufacturer may call for the tensile
testing of the fabric after inspection of the canopy for obvious
visual damage. This is very important because there was a fabric
deterioration problem with certain parachutes several years
ago. An AD was issued, and while the exact causewas never determined,
a side benefit was the development and adoption of a non destructive
fabric pull test method. This method was adopted by the Parachute
Industry Association (PIA) as Technical Standard TS-108, Parachute
Canopy Fabric Pull Test, Non-Destructive Method. This method
of testing canopy fabric for strength has been adopted by several
canopy manufacturers as suitable for testing their canopies.
However, the rigger must be careful in using this test method.
The proper equipment is essential for accurate testing and the
type of material must be known in order to test to the correct
strength. The testing equipment is shown in figure 5-12. The
full standard can be found in Appendix I of this handbook.
Figure 5-12. TS-108 test equipment.
4. Along with the pull test, the AD also requires testing the
canopy mesh with a solution of Bromo Cresol Green indicator
to determine the presence of an acid condition. The Bromo Cresol
Green indicator is a dark blue liquid in its standard state.
It turns yellow when it contacts acid—the stronger the
acid, the brighter the yellow. If the test is positive, the
canopy will need to be treated to neutralize the condition.
The AD highlights the manufacturer’s service bulletin
as to how to comply with this test and procedure.
5. If the canopy has a deployment device such
as a diaper, check that it is securely attached, particularly
after use. Check the grommets, line stow bands, elastics, or
other line stow devices. Pay particular attention to where the
stitching attaches to the canopy fabric. This area can be particularly
prone to damage during opening.