On 08/10/2015 10:30 AM, Stevens wrote:
Anton, I also worked in a "jerk and jam" facility, the so-called first line maintenance. We got the systems up and running and then sent the boards,assemblies/whatever to a repair facility. Each group then maximized their effort for the corp. At a vendor-run equip maint school there were a couple of guys from the FAA who had to know the trouble resolution down to component level, which let me know that the fed gov't wasn't running very efficient but hey, big surprise, eh? What really bothered us was the "bad off the shelf" new parts that had their own set of failure indications which could, and often did, run us around for hours trying to resolve the problems.
I like that term! Believe me, an aircraft carrier can carry a LOT of spares! And they better be 'burnt in' before they are put on the shelf. MIL-SPEC is a strange world in many ways. Not only can many electronics survive in conditions where humans cannot, but the attitudes towards development & documentation are very different. It isn't so much that the equipment has to be maintained by people with an IQ of 30 so much as it has to be maintained by untrained people in extremes of weather and temperature who are under fire, wearing thick gloves and body armour, at night, possibly in a swamp or in a desert sandstorm, with no tools other than a (large) knife and the but of their machine pistol. The documentation has to reflect this. OBTW, the documentation was left behind because of weight considerations in favour of extra ammunition. I was told that on the 'carriers, during the quiet time, the "jerked" modules get tested. nobody would waste time repairing them, but maybe they weren't shot up so much and can be re-used. But is a low priority issue. When a module has a bullet though it or similar there is very little doubt about why it failed. Once we got a module back that baffled us ... until we put it in a low pressure chamber and saw a couple of the caps ... expand and push away from the circuit board. And I mean low pressure, not mile-high Denver pressure. That and pulling a hi-G turn ... well not the sort of thing you find in a server room. Least way not often. And one day I'll get around to unblocking that printer .... -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org