The digital flight data recorder of an Air India plane that crashed in Ahmedabad has been recovered from a rooftop near the crash site.

It said the bureau has begun its work with “full force”.

The black box recovery marks an important step forward in the investigation, Civil Aviation Minister Ram Mohan Naidu said in a social media post.

The key inspections include fuel parameters, cabin air compressor, engine control system, hydraulic system and a review of take-off parameters, according to the order.

Prime Minister Narendra Modi met with the lone surviving passenger on Friday, a day after the Air India flight fell from the sky and killed 241 people on board and several people on the ground.

The London-bound Boeing 787 struck a medical college hostel when it fell in a residential area of the northwestern city of Ahmedabad minutes after take-off on Thursday.

DNA testing was being conducted to identify bodies that were mostly charred beyond recognition.

More victims are expected to be found in the search at the crash site.

—with AAP