Only 70 out of the total 119 aircraft of Jet Airways are currently operational, a senior DGCA official said on Thursday.
The remaining 49 aircraft are grounded and the airline has been told to ensure that passengers do not suffer because of flight cancellations resulting from this situation, the Directorate General of Civil Aviation official told PTI.
The official described the situation as "dynamic", indicating more aircraft of the Airways could be grounded.
The Indian aviation watchdog official added that the airline has been told that only "airworthy" aircraft, which are completely fit for flying, should be used in operations.
According to Jet Airways website, the airline has 119 aircraft in its fleet.