Engine 1 and Engine 2 reduce off inside 1 second: What brought on Air India airplane crash? 10 key findings from probe report | India Information – Instances of India
NEW DELHI: The Plane Accident Investigation Bureau (AAIM) Saturday launched its preliminary report into the tragic crash of Air India 171 in Ahmedabad on June 12, which claimed 260 lives.The 15-page preliminary report, launched a month after tragic crash, particulars the early findings and present standing of the investigation into the crash of Air India Flight AI171, a Boeing 787-8 Dreamliner sure for London Gatwick. The plane crashed simply moments after takeoff, slamming right into a medical hostel complicated close to the airport. Of the 241 folks onboard, just one passenger survived.The report reveals a sequence of occasions marked by mid-air engine shutdowns, cockpit confusion, and failed restoration makes an attempt simply seconds after takeoff.
Listed here are the important thing findings from the preliminary investigation report:
- Gas to each engines reduce off mid-air: Simply three seconds after liftoff at 08:08:39 UTC, the
gas cutoff switches for each engines had been triggered, one second aside. “The plane achieved the utmost recorded airspeed of 180 Knots IAS at about 08:08:42 UTC and instantly thereafter, the Engine 1 and Engine 2 gas cutoff switches transitioned from RUN to CUTOFF place one after one other with a time hole of 01 sec,” the report states.
- Cockpit voice recorder captures pilot confusion: The cockpit voice recording reveals confusion within the closing moments. “Within the cockpit voice recording, one of many pilots is heard asking the opposite why did he cutoff. The opposite pilot responded that he didn’t achieve this.” Investigators are trying into whether or not the switches had been triggered manually, inadvertently, or by a system malfunction.
- Relight try on engines: The flight information reveals that an automated relight was tried. Engine 1 briefly responded, however Engine 2 didn’t recuperate regardless of a number of makes an attempt to reintroduce gas. This failure finally made it unattainable for the plane to take care of thrust.
- Emergency RAT deployment: The Ram Air Turbine (RAT), an emergency energy supply deployed in response to energy failure, activated proper after takeoff, a transparent indicator of lack of electrical energy to crucial techniques.
Mayday name issued moments earlier than: At 08:09:05 UTC, one of many pilots issued a misery name: “MAYDAY MAYDAY MAYDAY.” The Air Site visitors Controller tried to substantiate the decision signal however acquired no additional response. Seconds later, the plane crashed.
- Plane crashed in nose-up angle: Flight path evaluation reveals the plane hit buildings close to BJ Medical Faculty with an 8-degree nose-up pitch and stage wings. With no thrust from both engine, the plane couldn’t maintain flight.
- Thrust levers present in idle post-crash: Though the thrust levers had been in takeoff place throughout flight, they had been present in idle after the crash. Flaps and touchdown gear had been confirmed to be in customary takeoff positions, ruling out irregular configuration as an element.
- Wreckage unfold throughout 1,000 toes: The airplane disintegrated throughout a large zone, hitting a number of buildings. Particles, together with engines and touchdown gear, was scattered over greater than 1,000 toes, indicating the power of the affect and trajectory.
- Plane airworthy, no gas management points logged earlier: The plane had legitimate airworthiness certification. Although there have been some minor Class C and D MEL (Minimal Tools Checklist) points, none associated to gas management. Notably, no earlier points with gas cutoff switches had been reported.
- Non-compulsory Boeing advisory not adopted: Whereas Boeing had issued an non-compulsory advisory on gas management change locking mechanisms, Air India had not carried out the really helpful checks. The plane’s throttle management modules had been changed in 2019 and 2023.
Subsequent steps in investigation
The AAIB report confirms that wreckage evaluation, autopsy reviews, and part inspections are ongoing. “At this stage of investigation, there aren’t any really helpful actions to B787-8 and/or GE GEnx-1B engine operators and producers,” the company stated.Air India said it’s cooperating absolutely with the investigation. Boeing, too, stated: “We are going to defer to the AAIB to supply details about AI171, in adherence with the United Nations Worldwide Civil Aviation Group protocol generally known as Annex 13.”
