AI plane crash probe: What happened before the Mayday call? Timeline of final moments | India News
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Diverging Reports Breakdown
AI plane crash probe: What happened before the Mayday call? Timeline of final moments
Air India Dreamliner landed in Ahmedabad from New Delhi as AI423. The aircraft was observed departing from Bay 34 at the airport. In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The CCTV footage obtained from the airport showed Ram Air Turbine (RAT) getting deployed during the initial climb immediately after lift-off. Both engines’ values “passed below minimum idle speed”, and the RAT hydraulic pump began supplying hydraulic power. The report revealed that the deadly fuel control switches turned from CUTOFF to RUN, leading to the sudden loss of thrust. Air India said that it continues to that it has lost 260 lives in the crash. The cause of the crash has not yet been determined, according to the Air India Accident Investigation Bureau (AAIB) Report into the crash was released on Monday. The investigation is ongoing and is expected to be completed by the end of the month. The NTSB has released its preliminary report into the accident.
11.17am : Air India Dreamliner VT-ANB landed in Ahmedabad from New Delhi as AI423.
: Air India Dreamliner VT-ANB landed in Ahmedabad from New Delhi as AI423. 1.18.38pm : The aircraft was observed departing from Bay 34 at the airport.
: The aircraft was observed departing from Bay 34 at the airport. 1.25.15pm : The aircraft requested taxi clearance, which was granted by air traffic control; a minute later the aircraft taxied from the bay to Runway 23 via Taxiway R4, backtracked and lined up for take-off.
: The aircraft requested taxi clearance, which was granted by air traffic control; a minute later the aircraft taxied from the bay to Runway 23 via Taxiway R4, backtracked and lined up for take-off. 1.32.03pm : The aircraft was transferred from ground to tower control.
: The aircraft was transferred from ground to tower control. 01.37.33pm : Take-off clearance issued.
: Take-off clearance issued. 01.37.37pm : The aircraft started rolling.
: The aircraft started rolling. 01.38.39pm : Aircraft lifted off. “The aircraft air/ground sensors transitioned to air mode, consistent with liftoff,” the report said.
: Aircraft lifted off. “The aircraft air/ground sensors transitioned to air mode, consistent with liftoff,” the report said. 01.38.42pm: Aircraft reached max airspeed of 180 knots. “Immediately thereafter, the Engine 1 and Engine 2 fuel cutoff switches transitioned from RUN to CUTOFF position one after another with a time gap of 01 sec. The Engine N1 and N2 began to decrease from their take-off values as the fuel supply to the engines was cut off. In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so. The CCTV footage obtained from the airport showed Ram Air Turbine (RAT) getting deployed during the initial climb immediately after lift-off. The aircraft started to lose altitude before crossing the airport perimeter wall.
01.38.47pm : both engines’ values “passed below minimum idle speed”, and the RAT hydraulic pump began supplying hydraulic power.
: both engines’ values “passed below minimum idle speed”, and the RAT hydraulic pump began supplying hydraulic power. 01.38.52pm : Engine 1 fuel cutoff switch transitioned from CUTOFF to RUN.
: Engine 1 fuel cutoff switch transitioned from CUTOFF to RUN. 01.38.56pm : Engine 2 fuel cutoff switch also transitions from CUTOFF to RUN. “When fuel control switches are moved from CUTOFF to RUN while the aircraft is inflight, each engines full authority dual engine control (FADEC) automatically manages a relight and thrust recovery sequence of ignition and fuel introduction. Engine 1’s core deceleration stopped, reversed and started to progress to recovery. Engine 2 was able to relight but could not arrest core speed deceleration and re-introduced fuel repeatedly to increase core speed acceleration and recovery.”
: Engine 2 fuel cutoff switch also transitions from CUTOFF to RUN. “When fuel control switches are moved from CUTOFF to RUN while the aircraft is inflight, each engines full authority dual engine control (FADEC) automatically manages a relight and thrust recovery sequence of ignition and fuel introduction. Engine 1’s core deceleration stopped, reversed and started to progress to recovery. Engine 2 was able to relight but could not arrest core speed deceleration and re-introduced fuel repeatedly to increase core speed acceleration and recovery.” 01.39.05pm : “At about 08:09:05 UTC, one of the pilots transmitted ‘MAYDAY MAYDAY MAYDAY’.
: “At about 08:09:05 UTC, one of the pilots transmitted ‘MAYDAY MAYDAY MAYDAY’. 01.39.11pm : Data recording stopped. “The EAFR recording stopped at 08.09.11 UTC,” the report said
: Data recording stopped. “The EAFR recording stopped at 08.09.11 UTC,” the report said 01.44.44pm: Crash fire tender left the airport premises for rescue and firefighting.
NEW DELHI: Aircraft Accident Investigation Bureau (AAIB) released its preliminary report into the Air India plane crash that claimed 260 lives in Ahmedabad.The report revealed that the deadly crash occurred after both engines’ fuel control switches turned from RUN to CUTOFF, leading to sudden loss of thrust.After the report was released, Air India said that it continues to ‘fully cooperate’ with the agency as it carries out its probe.In a post on X, Air India in the early hours of Saturday said it was ‘committed’ to help the families of the victims.“Air India stands in solidarity with the families and those affected by the AI171 accident. We continue to mourn the loss and are fully committed to providing support during this difficult time,” it said.Air India acknowledged the “receipt of the preliminary report released by the Aircraft Accident Investigation Bureau (AAIB) today, 12 July 2025,” it said.