You can't ignite jet fuel with a spark. The stuff is d@mn hard to ignite. It's pretty much like diesel or kerosene.
https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR0003.pdf
This might be the report I read some years back, and if it is, when you look at their references for how many joules of energy were required to ignite that fuel, it is clearly impossible. There just wasn't enough power in the wiring to accomplish it.
Jet fuel is hard to ignite. Here, let me show you.
https://youtu.be/7nL10C7FSbE?si=otth9anWJrqezd8W
Now you watch that section on the guy trying to light jet fuel on fire with a torch, and then come back and tell me it ignited with a spark.
I'll wait. :)
Jet-A vapor, not “fuel”.
There is precedent for Jet-A vapor explosions (in fuel tanks) on airliners:
https://en.wikipedia.org/wiki/Philippine_Airlines_Flight_143
https://en.wikipedia.org/wiki/Imperial_Iranian_Air_Force_Flight_48
https://en.wikipedia.org/wiki/Avianca_Flight_203
Page # 132 here for Jet-A flashpoint specs:
https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR0003.pdf