C-GFAJ, an Airbus 330-300 aircraft operated by Air Canada, was conducting flight ACA301 from Montreal/Pierre Elliott Trudeau Intl, QC (CYUL) to Vancouver Intl, BC (CYVR) with 10 crew members and 291 passengers on board. During cruise flight at FL380 in the vicinity of Duluth Intl, MN (KDLH), the flight crew elected to divert to Winnipeg/James A. Richardson Intl, MB (CYWG) due to extremely high vibrations on the number one engine (Rolls Royce – UK RB211 Trent 772B-60). No emergency was declared, and the flight landed at CYWG without further incident.
The operator’s maintenance carried out fan lubrication and vibration survey tests.
The aircraft was returned to service.