Cam told the story but from what I can remember it was two things that kinda set shyt off between Cam and Hov.
1. When Cam got there, Hov was having problems with Kay Slay. Hov told Cam to watch his self around Slay. Being that that's Cam's people, it rubbed him the wrong way.
2. Dipset was doing their thing and Hov was initially supportive, regardless of the Slay problems. But Hov already kinda had one foot out the door so when Dame made the announcement about Cam being VP, he was pretty much done.
According to Bleek, the plane incident was when Hov was officially done.