(dé)pressurisation de KC135

[Warlordimi]

Je me demandais comment on pouvait transformer ceci:



En cela...



Puis je suis tombé sur cette vidéo... plutôt impressionnante http://www.liveleak.com/view?i=72e_1208694365

C'est pas un avion, mais c'est le même principe!

[.:YODA:.]

Waw dingue cette vidéo
Ca donne pas envie de voler haut tout ça

[*Aquila*]

Si tu as un lien diagnostiquant ce qui est arrivé au Boeing, je prends.

[pOy-yOq]

Voilà ce que j'ai retrouvé dans mes "archives" : http://cfoiret.free.fr/ExplosionC135.pdf

[Warlordimi]

Si tu as un lien diagnostiquant ce qui est arrivé au Boeing, je prends.

En anglais: http://www.aircraftguru.com/aircraft-vi ... p?v_id=327

This is an example of what happens when we do not pay attention to detail, and do not follow instructions and checklists! A KC-135 Aircraft was being pressurized at ground level. The outflow valves which are used to regulate the pressure of the aircraft were capped off during a 5 year overhaul and never opened back up. The post-investigation revealed: that a civilian depot technician who, "had always done it that way," was using a homemade gauge, and no procedure. The technician's gauge didn't even have a max "peg" for the needle and so it was no surprise he missed it when the needle went around the gauge the first time. As the technician continued to pressurize the aircraft, and as the needle was on its second trip around the gauge the aircraft went "boom" - the rear hatch was blown over 70 yards away, behind a blast fence!

[Dakota]

Trouvé sur le site qui héberge la page (http://www.hanford.gov)

The outflow valves on a KC-135 aircraft, which are used to regulate the pressure of the aircraft, were capped off during a 5-year overhaul and, for some reason, were not reopened. A civilian depot technician subsequently performed a pressure check on the aircraft with a homemade gauge and without a procedure. The gauge didn't have a maximum peg for the needle so the technician did not see the needle go around the gauge the first time. As the technician continued to pressurize the aircraft with the needle on its second trip around the gauge, the aircraft exploded, blowing the rear hatch over 70 yards! Fortunately, no one was injured.


Analysis:
Closed systems must be adequately vented or provided with over/under pressure relief devices when performing maintenance that can affect pressure in them. System designers must consider likely pressure excursions when calculating relief set points and flow capacities. Work that disables relief protection must be planned and conducted very carefully, and should, if possible, provide alternate pressure/vacuum relief devices while the primary device is disabled. Positive checks should be included in work instructions to restore the primary relief devices to operation when the work is finished.
The [...] incident reinforces the need to be sure we have trained people, who have the right tools, and who follow procedures.

Il y en a un qui a dû passer quelques nuits blanches. Et son plan de carrière a probablement connu quelques bouleversements. J'espère que sa hiérarchie a eu le compte également, car rendre possible une erreur pareille de la part d'une personne remet en cause toute la chaîne, pas uniquement le "coupable".

[greg765]

La vache!!
Il a morflé le zinc, il est fichu!!


:huh:

[Dakota]

La vache!!
Il a morflé le zinc, il est fichu!!


:huh:

Oui, son avenir est derrière lui, pas de doute!

[Warlordimi]

Oui, son avenir est derrière lui, pas de doute!

Je connais plein de filles qui ont leur avenir derrière elles

[Dakota]

Et de castors qui construisent leur habitat avec l'outillage du bord faute de mieux!

[Corktip 14]

C'est moi ou je trouve votre esprit à tous vachement mal tourné?

[Dakota]

Tu me vois toute honteuse devant l'interprétation que tu fais de mon post!
Allez désolée, j'arrête le HS.

[ironclaude]

Le KC 135 a explosé sous l'effet d'une trop forte pression interne, alors que le wagon implose (instabilité en compression), probablement parce qu'on a fait le vide dedans... ça ressemble plutôt à ce qui arriverait à un sous-marin plogeant trop profond... video très instructive.

Claude