garpe, the Comet case is an oft quoted but sometimes misunderstood case. As I recall in the initial design the Designing Engineers (most of whome had almost certainly come up from starting as Draftsmen or the like not gone to university and got a bachelors) designed and tested the airframe for cyclic stresses caused by pressurization.
However, to achieve this they'd used some kind of bonding process for the windows. This process was difficult/time consuming in production. So, the manufacturing/production guys asked for a change to conventional riveted structure.
I'm not sure who OK'd the decision withouth re-testing etc but it is they that arguably deserve the blame.
As to a consequence, well I'd say the massive contraction of the British Aerospace industry was at least in part related to this issue. Essentially the company faces the consequences/liability, if they pass that on to the relevant engineer insome way (dismissal, limited promotion etc.) is up to them.
Plus on at least some of the A/C it wasn't actually the windows that caused the problem, it was cut-outs for the ADF.
The lesson I learnt for this is don't forgo critical function in lieu of ease of manufacture. While expensive but functional equipment will face problems, non functional items no matter how cheap, seldom prevail.
KENAT,
Have you reminded yourself of faq731-376 recently, or taken a look at posting policies:
What is Engineering anyway: faq1088-1484