No, there isn't. And an engine fire does not cause an airliner to crash. We all train those every 6 months in the simulator, if you get that wrong you'll fail the sim check and not get back to flying commercially until you've done remedial training and a satisfactory check fight.

So there is more to this crash than just an engine fire, or simple "pilot error"

> Is there actually any kind of believable “pilot error” that can cause a passenger 737-800 to catch fire in the air and crash?

Yes, here's one (on an A300) where pilot error while operating the rudder sheared off the vertical stabilizer and caused a crash:

https://en.wikipedia.org/wiki/American_Airlines_Flight_587

There were reports of an explosion/fire in the air, as the plane pulled itself apart.

> The crash was witnessed by hundreds of people, 349 of whom gave accounts of what they saw to the NTSB. About half (52%) reported a fire or explosion before the plane hit the ground. Others stated that they saw a wing detach from the aircraft, when in fact it was the vertical stabilizer.

Hitting another aircraft. See the psa flight that went down in San Diego years ago, they even have a few pictures of it after the hit and mid air fire.

The pilot failed to successfully evade an incoming missile?