Rob, I think there should be rebuttal to your statement about wasted money replacing parts still in good working order.
Alaska airlines flight 261 crashed into the Pacific Ocean because a jackscrew was put back into service after passing maintenance checks that were inadequate. It suffered excessive wear because of inadequate lubrication (maintenance at fault there).
The information I had at the time said it was still .001" in tolerance.
The part was still in "good shape" (it was still within tolerance). Expected wear was .001" per 1000 flight hours, while Alaska was actually getting 12 times as much (.012" per 1000 hours).
There were a number of chances to avert the accident; one of them was to accept the cost of replacing a "good" part that was so close to being bad.
Replacing parts that are still good keeps the margin of safety of a machine well away from 1.0.
Good point, Warren. Prlobably billions have been wasted by replacing parts that were still in good shape. There is a fair chance our car oil would be effectiuve for thousands of miles more than we let it.
You have to wonder how many industries could still use this technology. Imagine the expesive parts replaced through PM that really had never been stressed. I am thinking airplanes? bull dozers, politicians?
This is a good way of managing the ownership or rental of a crane. This type of analysis has been used on plant equipment for nearly a decade now. In many cases, the data readings go to the machine vendor who maintains the machine's uptime for the manufacturer. Smart equipment makes efficient equipment.
As an industry, we now need to up our game and provide contractors with easier ways to properly identify and report counterfeit products and build collaboration between manufacturers, design engineers, industry organizations, and government.
The shift to aluminum is gaining momentum and the demand from automakers for aluminum is soaring, "expecting to reach one billion pounds this year, up from 200 million in 2012, and to grow by more than 30% annually through 2020."
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