The Aircraft Accident Investigation Bureau (AAIB) has successfully decoded all data from the black box of the plane that crashed in Ahmedabad, according to Union Civil Aviation Minister Ram Mohan Naidu.

Civil Aviation Minister K Rammohan Naidu told Rajya Sabha that the AAIB is unbiased in investigating the Air India plane crash and urged restraint until the final report is released.

Sandhu, who was also a designated examiner for the Boeing 787-8 fleet at Air India, had taken delivery of the now-crashed 787-8 plane -- VT-ANB -- in 2013.

Rammohan Naidu says that there have been multiple reports not only in India but also in the Western media, trying to air their own viewpoints and narratives

AAIB had apparently approached Sandhu to be a domain expert in the ongoing probe, and he agreed to the proposal, the sources said.

Leaks in western media regarding Air India flight AI 171 crash prompt caution from aviation authorities and pilot bodies.

The AAIB confirmed that the probe into the crash is being carried out in a "rigorous and most professional manner in accordance with the AAIB Rules and international protocols."

Naidu also said that in a first of its kind instance, the AAIB has been successful in decoding data from black boxes of the crashed Air India plane in India itself.