Video The only survivor of Air India's crashes led their brother on the last road, killed in the same aviation tragedy

The only survivor of the collapse of the Air India plane last week, a British citizen of Indian origin, led his brother on the last road, to a funeral that took place in western India, according to the BBC. His brother, Ajay, was also aboard the plane, but did not survive the tragedy.

Visibly affected, Vishwashkumar Ramesh, 40, was one of those who wore the coffin to the crematorium, with the arm and face still bandaged by the wounds suffered. Their mother, dressed in a blue jump, went behind the coffin, along with other people.

The town of Diu lost a total of 15 people following the tragedy, and several locals came out of houses to attend the funeral, despite the torrential rain.

The Boeing 787-8 Dreamliner plane, which was to arrive in London, collapsed a few seconds after Thursday's take-off in Ahmedabad, western India. At least 270 people died, most of them passengers.

Ramesh's brother was just a few places away in the cabin.

Ramesh's survival is considered a miracle. According to the first interveners, he managed to go out through an opening in the fuselage and was filmed while moving away from the wreck, with flames and thick smoke in the back, being guided by a paramedic.

Satinder Singh Sandhu, ambulance driver and supervisor in the emergency service in Ahmedabad, told the BBC that he did not know who the man was helping and that he found only later from the news that he was the only survivor.

“I had lunch with my colleagues when I saw a thick smoke column rising to the sky. I thought it was a car accident or a bottle explosion. Then I found out that a plane had been crashed and I went on the spot,” Sandhu said.

The paramedic said that, after rescue, Ramesh repeatedly tried to return to the building in flames. “He didn't know what he was doing. He was coming out and leaving the complex. I told him to stop and I actually pulled him to the ambulance,” he said. “Only then did he tell me that his brother is still there and that he wants to save him. After that, I have not changed a word.”

Later, Ramesh confirmed for public television DD News to try to find Ajay.

The black Boeing 787-8 plane boxes were recovered

What happened in the cabin will be revealed by the advanced flight recorders of Boeing 787 (EAFR) – or “black boxes” – who, investigators, will help to reconstruct the story. Indian authorities say the recorders have been completely recovered from the place of collapse.

These devices record detailed flight and audio data from the cabin – from pilots radio calls to ambient sounds. The vocal records come from the individual microphones of the pilots, the radio transmissions and an ambient microphone that captures the background noises in the cabin.

The data recorders follow the position of the landing train and flaps, traction settings, engine yield, fuel flow and even activation of fire extinguishing buttons.

“If the recorder shows that the engines were operating in maximum power, then the attention will turn to flaps and volumes. If they are found in the correct position, then the investigation becomes extremely difficult,” says Goelz.

Flaps and volumes increase the portance at low speeds, helping the plane to take off and land safely, allowing them to fly slower without losing portance.