The six pilgrims and the pilot were killed when the chopper crashed in Katra, the base camp of the Vaishsnodevi shrine in Jammu and Kashmir's Reasi district.
A senior official at aviation regulator DGCA said the AAIB would be looking into the crash and a two-member team would be going to the incident site.
AAIB, which was under the Directorate General of Civil Aviation (DGCA), is now an independent body.
The chopper of a private airliner, which was carrying pilgrims from Sanjichat helipad in Trikuta hills, crashed at new bus stand area in Katra.