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Preliminary report into Air India crash released

bbc.co.uk

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Re: Preliminary report into Air India crash released

#261

Post by ekianjo »

stefan_ wrote: post #59
dcreater wrote: post #46

Earlier quoted context omitted.

Do you know if the mechanical position of the switch guarantees its electronic state without any possibility for hardware malfunction? If no, then you are claiming a person made one of the most grave acts of inhumanity ever. This sounds to me like an electronics issue - an intermittent, inadvertent state transition likely due to some PCB component malfunction

And then 10s later the switches magically fixed themselves? The likely not electronically connected switches since that would compromise engine redundancy?

The rodents were remorseful and fixed the cables in the meantime. /s

Re: Preliminary report into Air India crash released

#262

Post by WalterBright »

apt-apt-apt-apt wrote: post #153

Even if the plane had no power, why couldn't they have glided it down safely?

Speed can be traded for altitude, and altitude can be traded for speed. If you have neither, you're dead.

Engine failure shortly after takeoff is a major cause of fatal accidents.

Re: Preliminary report into Air India crash released

#265

Post by rogerrogerr »

anonymousiam wrote: post #260
rogerrogerr wrote: post #250

Earlier quoted context omitted.

Then why do we see the pilots notice the cutoff, move the switches back, and the engines respond as expected? The switched cannot move themselves. We’d expect to hear more commentary and confusion if the cutoff was active and the switches still in Run.

There would have likely been an indication on the glass cockpit displays that the fuel had been cut off, perhaps the pilot flying noticed this and asked the captain.

Yes, there is, but the reaction to that would be to look at the position the cutoff switches were in. We didn’t hear “wtf, they’re in Run” - the report says they just moved them from Cutoff to Run and the engines responded as expected.

I think you have to really reach to make this not pilot error. I know it’s appealing to call this a Boeing problem, but the evidence just from this prelim report is very compelling.

If you think it’s not pilot error, you can make some fake Manifold dollars: https://manifold.markets/JohnHughes/what-will-be-the-officia...

Re: Preliminary report into Air India crash released

#266

Post by testing22321 »

dboreham wrote: post #171
baseballdork wrote: post #125

Earlier quoted context omitted.

Fire, probably. But also, how complicated would you make the system if you needed to prevent certain switches from working during certain times of flight? At some point... we're all just in the hands of the people in the cockpit.

I can't put my car into reverse gear while driving down the freeway.

A friend did exactly that in a manual transmission, doing 100km/h.

She was mad and said she has to jam it hard ( going for 5th and missed), but it went into reverse. And the gearbox literally hit the road when she let out the clutch.

Re: Preliminary report into Air India crash released

#268

Post by throwawaycan »

WalterBright wrote: post #229
decimalenough wrote: post #11

> The aircraft achieved the maximum recorded airspeed of 180 Knots IAS at about 08:08:42 UTC and 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. So the fuel supply was cut off intentionally. The swi…

> It's difficult to conclude anything other than murder-suicide. Remember that incident where a cop pulled out his taser and tased the suspect? Except he pulled out his pistol and fired it. The taser looks nothing like a pistol, feels nothing like it, yet it is still possible to confuse the two in the heat of the moment.

It’s always easy in those threads to see who’s familiar with the world of aviation and who’s not.

No it’s not comparable to a cop that confuses things in the heat of the moment. Not anywhere close to be relatable.

If it was, planes would be crashing down the sky quite often (and it would have been fixed for decades already).

Re: Preliminary report into Air India crash released

#269

Post by [deleted] »

ggreer wrote: post #126
lazystar wrote: post #44

Earlier quoted context omitted.

still, it at least shows that there's been issues with the locking mechanism in the past. inadvertently bumping something that was assumed to be locked is a simpler theory; i find it hard to believe that a murder suicider would take this route, when the china nosedive option is easier, faster, and has a higher chance of success.

The preliminary report says the switches were triggered a second apart, so it would have to have been faulty switches and two inadvertent bumps. That seems unlikely to me.

[deleted]
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