September 2011

Our redesigned monthly DPCNewsletter draws your attention on the papers published on this Website at the same time, or reminds you of some papers already published (all of them are still available!) on the same topics as those dealt with in the new papers.

The URL address of our Website is:
http://www.ressuage-magnetoscopie-penetranttesting-magnetictesting-dpc.info
We recommend you put it in your “Favorites” list.

Underneath, find the list of the new papers that you can read this month on our Website:

In the "Edito" section

Airbus A 350 XWB wings

One of us, invited by the French COSAC(1) to the 49th International Paris Air Show Le Bourget, which was held on June 20-26, 2011, had the opportunity to be very close to and to marvel at the seeing of aircraft during their world première, such as the Airbus A 400 M, Boeing B 747-8 Intercontinental, etc.
This month, we give you some pieces of information dealing neither with PT nor MT, as the topic is the future Airbus A 350 XWB.

(1)The COSAC is the Aerospace Industry Certification Committee of the French Confederation for Non-Destructive Testing (COFREND).

Read more
http://www.ressuage-magnetoscopie-penetranttesting-magnetictesting-dpc.info/site/en/edito/edito-2011/195-septembre-2011-les-ailes-de-lairbus-a-350-xwb

In the "NEWS" section

Writing standards and specifications

Writing standards and specifications is a specific experience that requires a long industrial expertise and a good knowledge of the industrial processes and of their parameters.
Our website has already pointed out some discrepancies in standards due to their authors: using terms that are not standardized, translation mistakes, inaccuracies, relics of the past, etc., which lead to misunderstandings and misleading interpretations.
Sometimes, standards and specifications may make some parameters mandatory, while other parameters, though also essential for a good inspection, are not even stated.
This paper shows what the consequences may be and how to prevent such mistakes.

Read more
http://www.ressuage-magnetoscopie-penetranttesting-magnetictesting-dpc.info/site/en/news/information/194-redaction-des-normes-et-des-specifications

In the "Oldies but goodies" section

Insoluble particles in a colour contrast penetrant

Half a century ago, the aerospace industry widely used colour contrast penetrants in tanks. Much has changed since then.
This mini-story is about the mishap that occurred when an aircraft manufacturer found insoluble particles in a colour contrast penetrant.

Read more
http://www.ressuage-magnetoscopie-penetranttesting-magnetictesting-dpc.info/site/en/oldies-but-goodies/pt-stories/193-des-particules-insolubles-dans-un-penetrant-colore

We, Pierre CHEMIN and Patrick DUBOSC, welcome any comment, any idea. If you have some examples you would like to see discussed here, please give us all the useful indications. If you require confidentially, we would modify locations, names and some parameters to prevent any traceability.
Nevertheless, we are convinced that our site may be a kind of surge-valve: the topic is NOT to target this company, or that auditor; but it is always to make users think, to make them ask themselves, or others, the right questions.

We may also give advice, once again on a confidential basis if needed: please, feel free to ask questions, to document our data basis: about Material Safety Data Sheets (MSDS), about environment, a chemical name you don't understand, a Penetrant process you have heard about, etc.
We have plenty of examples, some being out of all the specifications/standards, which led to the discontinuities detection, when the "current, normal, processes" prevented discontinuity finding.