I saw one about 3 or 4 weeks ago.
I shot up the bandit (cannot remember now who it was) and so the wings come off and the fuselage flaming. Figuring it was a goner, I pulled off my attack run and lazily turned to grab alt., just then I hear ping, ping, ping, as the flaming fuselage is shooting me.
I was able to reverse and put some more rounds into him, and he finally went in.
The bandit (I wish I could remember who it was) and I did correspond on open channel. I told him what I saw and he said he was intact until that last and final run I made at him, which ended the fight.
He was surprised I had broken off the fight like I did after the first pass (which on my FE indicated a dead bird).
Anyway, I have only seen it happen once.
Cobra