Workload; Troubleshooting; Distraction
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Took Evasive Action; Flight Crew FLC complied w / Automation / Advisory; General Declared Emergency
Aircraft
Departed and 80 miles west; right recirc fan tripped off with associated EICAS message. QRH procedure performed. FA's [Flight Attendant] report fumes and haze in cabin.  Dispatch notified; vectors to return the departure airport. Landing; and overweight landing checklists performed.  ARF standing by; normal landing;  fire chief inspected outside aircraft;  returned to gate.
A B767 EICAS alerted REC FAN so the crew accomplished the QRH. The flight attendants then reported cabin smoke and haze so the flight returned to the departure airport.