American Airlines Boeing 777-200 flight AA105 is declaring an emergency and returning to Heathrow.
UPDATE 1650UTC We have confirmation flight AA105 returned to London due to a mechanical issue.
UPDATE 1624UTC Boeing 777-200 flight AA105 safely landed runway 27L followed by fire trucks.
UPDATE 1618UTC American Airlines AA105 is on approach to runway 27L at Heathrow for heavy landing.