DGCA has directed Air India to ground all six B 787, known also as the Dreamliners, according to reports.
Reports saud that regulator's move could put Air India's turnaround plan in a soup as it was banking heavily on 787s for its return to profitability.
Two 787s are due to arrive from Paris and Frankfurt to Delhi around 9 and they will then be grounded, DGCA was quoted as saying.
There were reports that the other four dreamliner aircraft used for domestic operations have already been grounded.