A recent [Pilot Workshops.com] newsletter asked a good question; Grounding While Fueling? Their link to the article is: https://pilotworkshop.com/tips/grounding-while-fueling Spoiler Alert: it should be at a point that grounds the fuel tank(s) to eliminate the spark potential between it and the fueling system.
Okay, that's great. Hmmn, like probably most of us, N133RM has a composite tank sitting on rubber cushion strips further isolating it from any grounding exposure. And the fuel line going to the firewall bulkhead fitting? Yeah that's rubber too. So the question really asks us to seek the answer for our airplanes. So just what IS metal in the fuel tank? The finger screen is brass and it's held in place by a metal AN fitting that has a metal On-Off fuel valve. I plan to install a grounding lug on the outside of the AN fitting to an engine-connected ground. Then I CAN clip the fueling system to the exhaust stub sticking below the cowl. Now I'll be grounded! PS for extra points, are the fuel cap threads isolated (or insulated) from the composite tank material? Mine are not. Read the article for a suggestion on what to do with the fueling system nozzle. John Bouyea / OR81/ Hillsboro, OR N133RM KR-2S - imported, fixed & flying <http://www.bouyea.net/N133RM> www.bouyea.net/N133RM
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