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Features June 2015 Issue

What’s up With the Clock?

Most legacy aircraft came out of the factory with little round clocks in the panel, although these days they’re largely ignored in favor of the more convenient digital timers. Recall that a way of keeping time is listed among the required equipment for IFR operations—see 14 CFR §91.205(d). Technically, the “clock displaying hours, minutes, and seconds with a sweep-second pointer or digital presentation” is supposed to be certified, installed equipment, meaning it has to be the original clock or an approved replacement, and it has to be operational for legal IFR flight.

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