PORT Adelaide midfielder Sam Powell-Pepper will miss one more game after being found to have made inappropriate contact with a female and found guilty of "inappropriate behaviour unbecoming for an AFL player" by being drunk in public.

Powell-Pepper was stood down by the club's leadership group for the Power's round four clash against Essendon, chose to stand himself down the past weekend against Geelong and has been banned by the AFL from playing this week against North Melbourne.

The investigation was into an incident that occurred in the early hours of Sunday, April 8, with a complaint received the following day.

In determining the penalty, which Port Adelaide said in a statement the midfielder had accepted, the AFL took into account Powell-Pepper had missed the past two games.

The AFL noted it made no other findings in relation to this incident.

Port chief executive Keith Thomas originally was not going to comment until Thursday but issued a statement in the wake of the AFL announcement.

Thomas said the club was looking forward to providing an accurate assessment of what happened in the nightclub.

"We acknowledge that it has taken longer to reach a conclusion than preferred and both Sam and the club acknowledge Sam's behaviour was inappropriate and accept the penalty," Thomas said.

"However there were many elements to this incident that needed to be fully understood before a decision could be fairly reached.

"We are looking forward to discussing these issues in some detail at tomorrow's media conference.

"Of most importance to Sam, the AFLPA and Port Adelaide was the AFL's finding that there was no evidence or suggestion of sexual or indecent assault, as has been speculated by some media outlets throughout the investigation."

Powell-Pepper played on Anzac Day in a SANFL clash against Sturt, and could return to the senior side against West Coast in round seven at Optus Stadium.