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Boeing said it will defer to India's Aircraft Accident Investigation Bureau for comment. Engine maker GE Aerospace did not respond to a Reuters request for comment. India's federal civil aviation ministry did not immediately respond to Reuters' email seeking comment.

At least 30 people were also killed on the ground as the airliner crashed into a medical college hostel near the airport. The crash poses a fresh challenge for Air India, which has long sought to become a "world-class airline",