My RV-6A has what appears to be the standard fuel caps:
https://store.vansaircraft.com/t-406-fuel-cap-assembly-t-406.html
or maybe this:
https://www.aircraftspruce.com/catalog/appages/Usher_flushCaps.php?clickkey=7373
On the LH tank, when I close the cap, it pops right back open. RH tank doesn't do that. Both feel a bit "spongy", though. The cap doesn't click down like I remember the Cessna 310 caps doing. If I rotate the lever a bit, so on the way down it scrapes against the sides, sometimes the friction of that can keep the fuel cap on. But I'm hesitant to just rely on friction like that; one of these days it'll pop open in flight.
Has anyone else experienced this or know why it happens?
My best guess thus far is that the edge of the "lever" is rounded instead of squared off. But I'd have replace it, to fix that, I think.
https://store.vansaircraft.com/t-406-fuel-cap-assembly-t-406.html
or maybe this:
https://www.aircraftspruce.com/catalog/appages/Usher_flushCaps.php?clickkey=7373
On the LH tank, when I close the cap, it pops right back open. RH tank doesn't do that. Both feel a bit "spongy", though. The cap doesn't click down like I remember the Cessna 310 caps doing. If I rotate the lever a bit, so on the way down it scrapes against the sides, sometimes the friction of that can keep the fuel cap on. But I'm hesitant to just rely on friction like that; one of these days it'll pop open in flight.
Has anyone else experienced this or know why it happens?
My best guess thus far is that the edge of the "lever" is rounded instead of squared off. But I'd have replace it, to fix that, I think.