It’s the flight that ended the relationship …

New details are emerging about Brad Pitt’s marriage-ending flight from France to Los Angeles on September 14. TMZ is reporting that Brad lunged at his 15-year-old son, Maddox, while on a private jet and made some sort of physical contact with him.

But the details of precisely what else happened are unclear …

Yesterday we reported that the LAPD had been contacted and the L.A. County Dept. of Children and Family Services had launched an investigation after getting an anonymous call that World War Z actor had reportedly attacked his eldest son on the flight, but that because the incident had happened mid flight that the FBI were now involved, instead of the police.

What’s being alleged is that soon after the private jet took off, Brad and Angelina fought and Maddox verbally defend his mom. TMZ is reporting that the 52-year-old lunged at the teen and Angelina jumped in between them to stop her husband. However, Brad physical came in contact with his sonic some way — what way we still don’t know yet.

We also don’t know if Brad and Angie were fighting or their son was behaving badly. We don’t know whether the physical contact Brad made with his son was on purpose or accidental. We don’t know if he was drunk or sober, some reports say he was drunk at the time of the incident, others say he got drunk after the incident.

What we do know is that Angelina wants sole physical custody of the six kids, and for Brad to only have visitation rights.

On the other hand, Brad has denied any abuse, however, sources close to him have acknowledged there was a flight on the private jet.