Why is the retaining chain so light?
The reason we chose to use a light retaining chain is that if the cap is ever left off, it won’t flail about and damage your wing while in flight. It’s only purpose is to hold the cap on the wing while refuelling. If the chain did not break, you would probably have to replace the cap plate and have extensive wing skin repair done on your plane. The cost of replacing a single cap is far less than repairing aluminum wing skin panels.
