Mark Wahlberg -- Michael Jackson, 9/11 Plane Story Is BS

It's an amazing story -- Michael Jackson and Mark Wahlberg fighting over a private plane in the days after 9/11. The only problem ... IT'S JUST NOT TRUE ... this according to sources close to Wahlberg.

A new book, entitled "Untouchable," recounts the tale of MJ and MW both jockeying for a Sony private jet. Sony eventually let MJ have it, claims the book.

But sources close to Wahlberg tell TMZ the whole thing is a work of fiction. We're told Mark had no need for a plane from Sony to fly back to Los Angeles because he had his own.