New Delhi/IBNS, July 8 -- The preliminary report of the Air India plane crash that killed at least 270 people has been submitted to the government, media reports said.

The report will be made public later this week, reports claimed.

Despite initial doubts, the AAIB succeeded in recovering the Crash Protection Module or CPM and the memory module.

The data has been downloaded.

What is a black box?

A black box refers to two critical flight recording devices on an aircraft- Flight Data Recorder and Cockpit Voice Recorder.

It is used to investigate accidents and understand what happened before a crash.

Despite the name, it is actually bright orange to make it easier to find in wreckage.

Ahmedabad plane crash

On June 12, a London-bound...