NEW DELHI: The Aircraft Accident Investigation Bureau (AAIB) has released its preliminary report on the helicopter crash that occurred near Gangnani in Uttarkashi, Uttarakhand, on May 8, 2025.

The accident involved a BELL 407 helicopter operated by Aerotrans Services Pvt Ltd. The crash resulted in the death of six people, including the pilot, and left one person seriously injured. Among the deceased were five women pilgrims who were on their way to the Gangotri temple.

According to the AAIB report, the helicopter began descending from its assigned altitude about 20 minutes after takeoff. The pilot attempted an emergency landing on the Uttarkashi-Gangotri National Highway but was unsuccessful.

During the landing attempt, the helicopter’s main rotor struck an overhead fiber cable running alongside the road, leading to the crash.

The pilot, who was among those fatally injured, was 59 years old and had 6,160 hours of flying experience, the report stated. The AAIB also noted, "The NTSB, USA & the TSB, Canada have appointed Accredited Representative & Technical Advisors for this investigation. The investigation team is coordinating with them for further course of action required to find out the root cause(s)." It added that a technical advisor from Rolls-Royce had travelled to India to assist with engine and powerplant-related activities.Also read: Aircraft accident investigation bureau team reaches Uttarkashi to probe chopper crash The last scheduled inspections of the helicopter were conducted on April 25, 2025, the report said. The investigation is ongoing to determine the cause of the crash.