It mapped the entire crash site, the path in which the debris was scattered, location of the five bodies, the place where the engine was found and the trees that were first hit by the helicopter.

After meeting officials here, the team left for New Delhi. It plans to visit the crash site after two weeks and conduct further probe. The panel plans to submit its probe report to the government in two months. The DGCA has already recovered the black box or cockpit voice recorder and is trying to decode it.

Meanwhile, the Central Bureau of Investigation (CBI) has launched a probe into the helicopter crash. Headed by Deputy Inspector General V.V. Lakshmi Narayana, the CBI's multi-disciplinary team involving officials from the Indian Air Force and DGCA, will look into the airworthiness and maintenance of the Bell 430 helicopter.

State government officials said the CBI would probe the crash from all angles, including possible sabotage. It will try to find out if the signals of the helicopter were tracked by anyone who knew of the schedule in advance.

The investigation team will also go into the diversion of the helicopter from its regular flight path and the response of the air traffic control in Chennai to distress calls from the helicopter.

The CBI probe is independent of the parallel investigation by the Crime Investigation Department (CID) of state police.

The state government has also constituted a two-member expert committee to conduct a probe. All four investigations will run simultaneously.