India, Dec. 2 -- The Directorate General of Civil Aviation (DGCA) has launched a probe into an Air India A320 neo aircraft, which allegedly operated on at least eight routes without a valid airworthiness certificate.

Meanwhile, the "concerned personnel" have been de-rostered until the investigation is completed, a statement released by the aviation watchdog said. The DGCA has further instructed the flight operator to ground the aircraft.

Meanwhile, on the directions of the regulator, Air India has also launched an internal investigation to identify "deficiencies in their system and put corrective measures in place to prevent such failures from occuring in the future."

The DGCA was informed by the airline on November 26 about the flying...