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Human errors..


Sensei

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Hi!

 

Are you watching Air Crash Investigation on Discovery/National Geographic Channel.. ?

I am always watching it, when have chance.

 

Today was episode with airplane which lost front window, and captain pilot was sucked out on 5 km.

Luckily stewards caught him in the right moment, when half of pilot was outside.

2rd pilot decrease altitude and landed so they could drag him back ASAP.

He survived, although with several seriously broken and frozen parts of body.

 

What was cause?

Day prior accident, the front window was replaced.

Engineer unscrew window,

and decided to replace screws to brand new, instead of reusing old one.

He went to storage, found exactly the same screw as he had in the hand, and asked grandpa-like storage manager about 90 similar 7D screws.

But he told him that this model of airplane is using 8D screws.

Engineer ignored this info, because 8D was not what he unscrew, and what was used already by airplane.

He found 7D in storage and used them.

 

Airplane was flying for 4 years with wrong screws without accident..

 

https://en.wikipedia.org/wiki/British_Airways_Flight_5390

 

Best Regards!

 

ps. Who is flying tomorrow.. ? :)

Edited by Sensei
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There is no other kind of errors in accidents. Only human errors.

 

Umm, no. Unless you are going to redefine being unable to anticipate unlikely natural phenomena as error. I mean, is it an error to proceed if you determine something is low-risk, say, 0.01% chance? But for every 10,000 events, on average, you should expect something to go wrong.

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