The move came a day after Indian officials told the airline to improve its operations, and as delays and canceled flights are drawing complaints from passengers.

For more than a decade, pilots and judges have warned that India’s breakneck urban development was pushing population centers closer to the nation’s runways.

Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane crash that left at least 270 people dead.