A passenger on the flight on which a senator's wife was charged with causing a disturbance says the woman was upset her husband was experiencing tightness in his chest, but she wasn't threatening.

Scott Wright, a former ambulance attendant, volunteered when the crew on the Ottawa to Saskatoon flight asked for anyone with medical experience to help Sen. Rod Zimmer, who wasn't feeling well.

He says Zimmer's wife, Maygan Sensenberger, was emotionally distraught by her husband's condition, but he never felt that she was a threat to anyone on the aircraft.

Wright says the 69-year-old Zimmer started feeling better after he was given some oxygen, but Sensenberger was still upset and the couple were fighting with each other over Zimmer's condition.

Sensenberger, who is 23, was charged endangering the safety of the aircraft and causing a disturbance and was scheduled to make a court appearance in Saskatoon today.

No one was injured in the incident and police say the safety of the aircraft was not compromised.