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VEGA launcher failure

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VEGA launcher failure

Old 18th Nov 2020, 18:10
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VEGA launcher failure

I was amazed to see some senior VEGA person blame the
failure on 'wrong cable into wrong connector', hence a human failure.
I remember when connectors & receptacles were designed such
that such mistakes were impossible. Lessons from the past forgotten !
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Old 18th Nov 2020, 18:25
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Probably a confusion about gender and attempt to be neutral in language
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Old 18th Nov 2020, 18:55
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Originally Posted by esa-aardvark View Post
I was amazed to see some senior VEGA person blame the
failure on 'wrong cable into wrong connector', hence a human failure.
I remember when connectors & receptacles were designed such
that such mistakes were impossible. Lessons from the past forgotten !
Didn't stop a mechanic wrongly connecting the aileron trim cables on a Jetstream in March, 2000 after maintenance work
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Old 18th Nov 2020, 20:35
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Do you have a source for that quote?

I would be surprised that they already know the details of that failed launch
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Old 18th Nov 2020, 21:00
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Do you have a source for that quote?

https://spacenews.com/human-error-bl...aunch-failure/
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Old 19th Nov 2020, 19:41
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The photographs during assembly will tell the tale. Quality Inspector on the lamb?
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Old 19th Nov 2020, 20:18
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Oh well, not that uncommon. After all, a Lufthansa MRO guy connected the aileron channels on the captains sidestick (A320) the wrong way around as well, which was noticed after take off with passengers on board. Nearly crashed, just a particularly sharp FO took over (basically cutting out the CPTs commands) and saved the aircraft.
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Old 20th Nov 2020, 02:49
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Tilt rotor written off in the early says due the same problem, SR-71, may have been A-12, had the same problem as well, though pilot managed to get it back on the ground following a circuit.

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Old 20th Nov 2020, 07:29
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Old 20th Nov 2020, 19:46
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The photographs during assembly will tell the tale. Quality Inspector on the lamb?
Do you have a sauce for that question?
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Old 20th Nov 2020, 21:24
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Not really, he just waved and said tartare.
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Old 21st Nov 2020, 06:21
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Isn't checking that the controls are free AND CORRECT a standard part of the PREflight check list?

At least for airplanes...
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Old 21st Nov 2020, 06:43
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Isn't checking that the controls are free AND CORRECT a standard part of the PREflight check list?
It is, but a number of accidents have resulted, the famous Roy Chadwick, designer of the Lancaster, died in the crash of the prototype Avro Tudor when over night the aileron control cables had been reversed during maintenance.
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Old 21st Nov 2020, 15:09
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I don't see what is wrong with left/right handed connectors & variants thereof.

I remember my father telling me that Hunter external tanks had 2 bolts one
longer than the other such that they were impossible to fit the wrong way round.
That is until some gorilla got his shoulder underneath, the short bolt managed to
catch a thread, and he wound it up. The long bolt was of course no problem. Whatever
you do something will always catch you.
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Old 21st Nov 2020, 21:35
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Originally Posted by esa-aardvark View Post
I don't see what is wrong with left/right handed connectors & variants thereof.

I remember my father telling me that Hunter external tanks had 2 bolts one
longer than the other such that they were impossible to fit the wrong way round.
That is until some gorilla got his shoulder underneath, the short bolt managed to
catch a thread, and he wound it up. The long bolt was of course no problem. Whatever
you do something will always catch you.
Never underestimate the creativeness of some people. When Boeing designed the throttle quadrant for the first FADEC 767, there where left hand and right hand throttle resolvers - with a key to prevent them being swapped. One day my then lead engineer got a call from the final assembly that the throttle resolver signals were not working correctly on a new build aircraft. He went out and discovered that someone had neatly machined the key off the resolver so that he could install it on the wrong side . I understand some stern words were exchanged before my lead confiscated the modified resolvers (he tagged them as unserviceable and kept them at his desk for 'show and tell' after that.
I think it was Wernher Von Braun that said 'it hard to design things to be foolproof, because fools are too darn ingenious'.
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Old 22nd Nov 2020, 03:14
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PRE-flight, as in just before you get on the runway to take-off, not whatever happened the night before...
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