India, June 25 -- The Directorate General of Civil Aviation (DGCA) said on Tuesday it has uncovered safety violations during surprise surveillance checks at major airports, ordering airlines and airport operators to implement corrective measures within seven days as part of a comprehensive safety review of the country's aviation sector launched after the deadly Air India crash in Ahmedabad.

The aviation regulator conducted intensive night and early morning surveillance operations at Delhi and Mumbai airports and found what officials described as systemic lapses across aircraft maintenance, ground operations, and airport infrastructure.

The enhanced oversight, initiated through an order issued on June 19 - a week after the Air India cras...