eli5 Why are instruments in plane crashes recorded in investigations?

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I’m not sure if this is still common practice or not, but why are/were plane instruments noted in their final positions when investigating an accident?

Would these dials not be tossed around like crazy during an accident? How do investigators know the dials are in their final positions from reading the information and didn’t just land in those positions during the accident? Do the instruments not move around more than I think?

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Anonymous 0 Comments

Not sure I know what you mean exactly – black boxes are digital recordings of everything that happened in the plane before and during the crash. It gives them the ability to make a fairly accurate model of the last few minutes / seconds leading up to the crash itself, so they can determine what went wrong. Add that to the cockpit voice recording (What the pilots are saying) and the accuracy improves. This is why the boxes are protected so well and are always what they’re searching for.

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