A321
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Troubleshooting; Workload
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed As Precaution; Flight Crew Requested ATC Assistance / Clarification; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Faint burning smell that turned into a sweet smell; lasted approximately two minutes in cockpit only; cabin crew could not smell anything. 30 minutes later substantial vibration noticed below floor of cockpit in avionics bay. Flight was diverted and Maintenance found ventilation blower fan in avionics bay had lost its bearings and was grinding.
Air carrier flight crew reported a fumes event during cruise. After troubleshooting flight crew executed a safe mechanical diversion.