Fireflybob - wings full of inflammable explosive
That'll be the problem then!
Last time I looked Jet A1 was not classed as an explosive. Perhaps fuel vapour mixed in the right ratio with air is potentailly explosive but, generally, one has to go to a fair amount of effort to get it to burn - that's what a gas turbine does!
In a catastrophic accident then spilt fuel does have a tendencey to ignite becuase it has been vapourised by force and there are numerous ignition sources.
If I find the fuellers have been filling my a/c with exlposive I will have to think twice about flying!