Investigators have recovered flight recorder data from the Air India crash earlier this month, the civil aviation ministry has confirmed, marking a key step in the probe.

At least 270 people, most of them passengers, were killed when the London-bound Boeing 787-8 Dreamliner crashed less than a minute after taking off on 12 June from Ahmedabad airport in western India.

Investigators had earlier recovered both sets of Enhanced Airborne Flight Recorders (EAFRs) - the "black boxes" - from the Boeing 787 crash site on 13 and 16 June. - one from a rooftop, the other from the debris.

It could be several weeks before the federal government is able to release information gathered from the recorders about the accident.

The particular aircraft model carries the two recorder sets to aid in thorough analysis. These combined units record flight data and cockpit audio.