Mumbai, Feb 22 (ANI): A Boeing 777 aircraft of American carrier United Airlines (UA) was grounded at Mumbai airport Friday night after engineers found that its right engine cover was badly damaged, officials said. The aircraft, operating flight UA-48 from Newark to Mumbai, was grounded, terming the damage as "major", the sources said, adding it was being suspected that the damage may have been caused during take-off. The carrier has despatched a team of engineers from the US to fix the problem.