Seat Guru has an AI 747-400 -- called 744

http://www.seatexpert.com/_UA_772_Intl1.html

The United 777 have same layout as AI since AI bought (or leased) them from United

I flew the Boeing 744 on upper deck BOM-DEL-LHR-JFK -- quite a hopeless experience -- food and service was ordinary. Essentially got the same food as Economy with addition of alcohol and choclates ...........

Hope the 777 is much better.