Katherine Jackson wants a do-over in her fight against AEG -- TMZ has learned, she just filed docs asking for a new trial ... after the jury ruled in favor of the concert promoters back in October.
As we reported, AEG emerged victorious after Katherine sued the company for wrongful death, claiming AEG negligently hired Dr. Conrad Murray to care for Michael Jackson before his "This Is It" concert tour ... the same doctor who was ultimately convicted of killing the singer with a fatal dose of Propofol.
Katherine has now filed legal docs looking for a second chance to convince a jury AEG is to blame for MJ's death ... claiming she didn't get a fair shot the first time around.
Katherine lists a bunch of reasons for her claim in the docs ... including jury misconduct, new evidence, and general procedural errors.
A judge has yet to rule on Katherine's request ... but she's definitely facing an uphill battle.