Cockpit voice recorder survived fiery Philly crash—but stopped taping years ago

Heroic work to recover and repair a CVR.

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[HootenDah]

It's great to mandate safety/monitoring/recording equipment, but if you never test to make sure it is working properly, you might as well save the weight and leave it off, right? Are there no regulations specifying that if you carry such things, they have to be tested periodically?

Airline pilot here: we test it every single flight. It’s a single button you press and hold for 2-3 seconds as part of the normal cockpit scan, at least on the types I’ve flown.