Preliminary Findings of Air India Dreamliner Crash

The Aircraft Accident Investigation Bureau has released its preliminary report on the Air India Dreamliner crash in Ahmedabad on June 12. The report confirms that both engines of the Boeing Dreamliner 787-8 shut down mid-air within seconds of take-off, leading to the tragic accident that claimed at least 270 lives, including 241 passengers and crew members.

Engine Shutdown and Fuel Cutoff Switches

A critical finding from the investigation is the transition of the fuel cutoff switches from ‘RUN’ to ‘CUTOFF’ position, which occurred almost simultaneously. This action starved the engines of fuel, causing them to shut down. Cockpit voice recordings captured one pilot questioning the other about the cutoff, with a response indicating no intentional action was taken.

Loss of Power and Deployment of Ram Air Turbine

The report highlights that the Ram Air Turbine (RAT) was deployed during the initial climb, signaling a total loss of power. CCTV footage from the airport corroborates this, showing no significant bird activity near the flight path. The aircraft began losing altitude shortly after take-off, crashing into the BJ Medical College Hostel.

Data from Black Box and Engine Recovery Attempts

Data from the Enhanced Airborne Flight Recorder (EAFR) revealed attempts to restart the engines. While Engine 1 showed signs of recovery, Engine 2 failed to regain core speed despite multiple relight attempts. The aircraft was airborne for only 32 seconds, covering a distance of 0.9 nautical miles before impact.

Normal Flap Setting and Landing Gear Position

The report clarifies that both the flap setting and landing gear position were normal for take-off. Thrust levers were found near idle at impact, but data indicates they were forward until then. Fuel control switches were also in ‘RUN’ position at impact.

No Evidence of Sabotage and Advisory on Fuel Switches

The AAIB found no immediate evidence of sabotage. It noted a 2018 FAA advisory regarding potential disengagement of fuel control switch locking features on similar aircraft models. Although Air India did not conduct suggested inspections, they were not mandatory.

Weather Conditions and Pilot Fitness

Weather conditions were favorable at the time of the crash, with clear skies and good visibility. The pilots were medically fit, well-rested, and experienced in flying this aircraft model.