The black box of the ill-fated Bell 430 helicopter that crashed killing Andhra Pradesh Chief Minister YS Rajasekhara Reddy and four others has been recovered, officials said on Friday.
The black box or cockpit voice recorder was recovered from Nallamalla forests in Kurnool district, where the helicopter crashed Wednesday.
The anti-Maoist Greyhounds force, which found the black box during search operations in the area, handed it over to a team of the Directorate General of Civil Aviation (DGCA) which began a probe into the crash.
"The black box is expected to help in the investigations to know the cause of crash. The team has taken it to Delhi to retrieve the messages. The investigators will know what were the last messages given by the pilots before the crash," said Lakshmikant, revenue divisional officer in Atmakur in Kurnool district.
The DGCA investigating team headed by RK Tyagi also held a meeting with the local civil and police officials.
Meanwhile, a case of unnatural deaths has been registered at Atmakur police station following a complaint by a local revenue official. The police booked a case under section 174 of the Criminal Procedure Code.
YSR, who first became chief minister in May 2004, was flying from Hyderabad to Chittoor district when his helicopter crashed in a dense forest and exploded in Kurnool district. His charred body was found Thursday, over 24 hours after the helicopter went missing.