[Ol' Dan Tucker]

It was definitely “Mythbusters.” Sorry you guys can’t track it down, but it’s out there.

I also searched around online, but found nothing.

Searching through the 'official' Mythbusters Encylclopedia of Myths for keywords, 'TWA 800' or 'kerosene' returns nothing.

Searching for '747' returned two episodes (#90) about whether a real 747 could blow a car off the runway and whether someone with no flight training could safely land a 747 (#94).

Searching for 'gas tank' returned one episode (#88) about the various myths surrounding gas tanks in cars.

Not a flame, but since you mis-remembered the altitude of TWA 800, it stands to reason that you might also be mis-remembering this, too.

[LS]

Nope. And I’m not “misremembering” anything. It was the TWA 800 gas tank explosion.

[LS]

I”m not registered there, but just go on the forum and ask who remembers the episode. I’m sure you’ll have plenty of hits.

[Yo-Yo]

There was an episode (#37) where they tested exploding hair cream on Buster the Test Pilot.

That and the Hindenberg episode are as close as I can come to anything aircraft and exploding.