New Delhi, July 20 -- Nearly a month after Air India flight AI-171 crashed seconds after take-off from Ahmedabad, investigators are focusing on the aircraft's tail section as a potential origin of the malfunction that led to the fatal accident, the Indian Express has reported.

The Boeing aircraft, which was airborne for just 26 seconds on June 12, crashed in a fireball, killing everyone except one passenger on board.

While the tail section broke off during impact, it escaped the worst of the post-crash fire.

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The aircraft's aft Enhanced Airborne Flight Recorder - commonly called the rear black box - was recovered from the rooftop of the...