Mandate for Investigation
All occurrences classified as Accidents are investigated by Aircraft Accident
Investigation Bureau (AAIB) and Investigations are ordered under Rule 11 of Aircraft
(Investigation of Accidents and Incidents) Rules, 2017.
Investigation into occurrences involving an aircraft of maximum mass over 2250 Kg or
turbojet airplane, which are classified as Serious Incident are carried out by AAIB
under Rule 11.
Investigation into occurrences involving an aircraft of maximum mass of 2250 Kg or less,
which are classified as Serious Incident or occurrences which are classified as
Incidents are carried out by DGCA under Rule 13.
AAIB may also conduct Investigations into occurrences involving an aircraft with
maximum mass of 2250 Kg or less, which are classified as Serious Incident or occurrences
which are classified as Incidents, if it feels that it is expedient to hold an
investigation into circumstances of such occurrence.
In addition, as per Rule 12, the Central Government may institute a formal investigation
into circumstances of any accident to an Indian registered aircraft if it appears that
it is expedient to hold such investigation. In such case, the Central Government shall
appoint a competent person to hold the investigation, and may appoint one or more
persons possessing legal, aeronautical, engineering, or other special knowledge to act
as assessors. One or more Investigators from AAIB shall be appointed as an assessors.