Investigators will want to know if plane crash was catastrophic one-off or part of wider problem with Dreamliner

Air investigators volition person an unfastened caput connected what could person caused the crash.

The Boeing 787 Dreamliner has a stellar information record. This is the archetypal fatal crash.

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And some pilots were experienced, with much than 9,000 flying hours betwixt them.

So what could person gone wrong?

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What we cognize truthful acold astir level crash
Moments earlier level came down

Contact was mislaid with AI171 conscionable seconds aft it took off, erstwhile it was astatine an altitude of conscionable 190m (623ft).

The 2 engines should person been moving astatine maximum thrust to summation the velocity needed to assistance 242 radical and a plane-load of substance disconnected the ground.

But video shows the craft failed to climb. Its chemoreceptor should person been pointed upwards, and the level accelerating. But it was flying level and past it descends, lifting its chemoreceptor astir arsenic if it was coming successful to land.

Investigators volition beryllium studying the video and the 2 achromatic boxes signaling cockpit conversations and method information to effort to recognize why.

It's imaginable determination was an motor nonaccomplishment of immoderate kind, possibly caused by a catastrophic mechanical fault. But the level is designed to beryllium capable to alert with 1 engine, adjacent astatine take-off, truthful thing other would person to spell incorrect too.

Both engines could person failed if they sucked successful a flock of birds arsenic the level took off. It's happened successful different aerial crashes.

Investigators volition besides beryllium checking that the pilots - and the plane's computers - were besides receiving the close information from each the sensors connected board, and that determination was nary occupation with the avionics, oregon electrical systems, connected board.

Experienced pilots who person studied the video of the level struggling to summation altitude person told Sky News that the flaps connected the wings look not to beryllium acceptable successful the mean take-off position.

The flaps astatine the backmost of the helping request to beryllium extended astatine the comparatively debased speeds of take-off and landing to summation the 'lift', the quality successful aerial unit that keeps an craft airborne. It's different origin aerial clang investigators volition look at.

But they volition beryllium moving swiftly to pinpoint the cause. The Dreamliner is utilized worldwide by dozens of airlines, and they volition privation to cognize whether determination is simply a wider occupation oregon that this was conscionable a catastrophic one-off.