NEW DELHI: A large panel on the belly of a Bangalore-bound Dreamliner of Air India fell off mid-air, putting about 150 passengers on board at a grave risk, but the aircraft landed safely.

The DGCA is probing the incident which occurred on Saturday when an 8X4 feet panel in the fuselage fell off while the plane was on its way to Bangalore from Delhi, leaving a gaping hole in the cargo hold, official sources said.

There were 148 persons, including the crew, on board flight AI-803 which landed safely at the Bangalore airport, the sources said, adding that the hole was noticed by the ground staff when they came to inspect the aircraft for its return journey.

A spare panel was flown to Bangalore and fitted on the Boeing 787, which was later declared fit to fly. But the return flight was delayed by over nine hours, they said.

Confirming the incident, airline officials said a panel had fallen off but was replaced and the aircraft was cleared for flights.

"Yes, there was a gaping hole. During the normal transit inspection, it was observed. Engineers immediately rectified it," an AI official said requesting anonymity.

"It was not an emergency. There was no safety problem," he added.

Besides long-haul international operations, Air India operates the Dreamliners on domestic routes like from Delhi to Chennai, Bangalore and Kolkata.

The incident came in the wake of a series of problems faced by the new aircraft, starting with the battery fire incident that grounded all Dreamliners across the world for four months. In July again, a fire broke out in an empty aircraft that was parked at Heathrow.