The Heathrow Movements website
lhr oct 2010
gives AAL87 as being N752AN on 7th October. A quick google gives this picture :
Photos: Boeing 777-223/ER Aircraft Pictures | !!!!!!!!!!!!!!
taken on Sept 19th which clearly shows no winglets.
libhomeradar - easy collect aircraft information - libhomeradar - easy collect aircraft information shows contacts on virtually all dates between. It can therefore be concluded that N752AN does NOT have winglets fitted
MD