"The black box of the chopper would be analysed at an HAL facility in Bangalore to find out the exact reasons behind the crash," Defence sources said here.
The data of the black box would be crucial as the pilot had given an emergency call before crashing in Sitapur district of Uttar Pradesh while going to Allahabad from Bareilly, they said.
The HAL is the original equipment manufacturer of the ALH Dhruv helicopter.
Meanwhile, IAF chief Arup Raha today visited Bareilly to pay homage to the personnel who lost their lives in the crash.
A Wing Commander, Squadron Leader, Junior Warrant Officer, Sergeant and an LAC along with two Corporals were killed in the crash.