Allez, pour la nouvelle annee j'offre a Norb. (un plus d'alimenter ce topic dedicace bashing) un peu de lecture en souhaitant que sa vision monochrome passera au noir et blanc, esperant meme qu'il connaitra la couleur un jour, meme si c'est avec beaucoup de retard!
Instead of being manufactured by the approved computerised process, Ducommun employees were cutting the parts by hand - literally using a felt-tipped pen to mark out the shape and then cutting the metal with a hand-cutter.
Not only did this result in parts which could never meet the mandated 3000ths of an inch accuracy - but the Boeing team realised it violated the official type design: any aircraft with these parts on them would be legally "unairworthy" - and therefore not allowed to fly.
But there was worse to come: every part in the production process has to be signed off at each stage of its manufacture on a document called a "shop traveller". This records that each individual stage of manufacture has been carried out in accordance with the type design.
The Boeing team discovered that Ducommun had apparently falsified these records: it had two sets of "books" - the official one recording that each part had been made by the computerised process and a second set recording the actual, handforming process which had really been used.
What that meant, in the eyes of the Boeing team, was that every single chord and bear strap manufactured by Ducommun had to be viewed as unlawful.
On a wing and a prayer - PEOPLE AND POWER - Al Jazeera English