INVESTIGATORS on the Air India crash probe have backed the leading theory about what went wrong after a “game-changer”; vid showed the final moments in detail.
More analysts now agree that an as the plane went down.
A HD video showed a “protrusion on the belly of the aircraft”;, with a “little grey dot”; beneath it.
Commentators say this is evidence of the Ram Access Turbine (RAT) deploying on the plane, which failed to climb more than 450ft.
Commercial airline pilot Steve Schreiber, known as Captain Steve, explained: “Many aeroplanes have it. It is just behind the wing on the right side of the aeroplane, there is a little door that holds it in.
“It looks like a little Evinrude motor, it’s a little two bladed prop.
“The purpose is to provide electrical and hydraulic pressure for the aircraft on an extreme emergency.”;
Steve explained there are three things which could cause the RAT to deploy on a 787: “A massive electrical failure, a massive hydraulic failure, or a dual engine failure.
“But I think the fact the aeroplane is mushing out the sky gives the idea it was a dual engine failure.”;
Other analysts agree that the RAT system deployed, and that the most likely cause was duel-engine failure.
Anthony Brickhouse, a US-based aerospace safety consultant, told the Wall Street Journal that the most reason the propeller comes out is because the pilot thinks both engines have failed.
However, he reiterated this is highly unusual, telling the paper: “In commercial aviation, a dual engine failure is extremely rare.
“Our engines today are more efficient and reliable than ever.”;
While there is growing consensus over the RAT deployment, investigators haven’t confirmed whether engine, hydraulic or other problems triggered the emergency system.
And it may be some time before we hear get any official diagnosis.
India’s Ministry of Civil Aviation said the accident remains under investigation and that more information would be provided in due course.
Air-accident investigations can take more than a year – and even then will often point to a number of contributing factors.
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