To be legal when flying under Instrument Flight Rules (IFR) you need to have an operating clock installed on your instrument panel. It can have an analog presentation with a sweep-second hand, or be a digital clock. This sounds simple enough. But some pilots seem a bit blase about this.
The Crossover Classic’s previous owner was one such pilot. He had a clock on the panel, all right. But it had given up the ghost long ago. “Ah, that doesn’t matter. I use my wristwatch,” he kept saying. Sorry, not good enough. The regs say a clock must be mounted on the panel. To correct the situation, the owner had an “inop” sticker placed under the clock. But that’s no good unless the airplane has an approved minimum equipment list (MEL), which it didn’t. “What’s an MEL?” the owner wanted to know.
To remedy all this, renowned aviation chronometer manufacturer Davtron kicked in with its M803 digital clock. This useful–and did I say required?–unit shows time galore. We located it at the top left of the pilot’s instrument panel, where it has served us well. I mainly use it to keep track of elapsed time between legs. Just push the right button once, and the clock starts counting up. Push it again, and it stops. Easy.
The M803 shows Zulu time, local time, flight time, and elapsed time. It also shows the electrical system voltage and outside air temperature. You use the M803′s lower two buttons to initially set your times, and the ship’s power then keeps the unit running. A backup internal battery keeps the unit running should there be a complete loss of electrical power. In this case, you’d be down to the ship’s battery for powering a (load-shedded) panel, plus the M803′s and L-3 Trilogy’s own internal battery supply (worth up to two hours of flying time, I’ve been told) if everything goes dark.
Davtron is perhaps the largest supplier of general aviation panel-mount timepieces, and for good reason: They’re durable and intuitive to use. You probably have one in the airplane you fly! And what if the M803, by some ill stroke of luck, kick the bucket? Well, there are digital clocks in the Garmin 430s abaord the Crossover Classic, as well as a clock in the Garmin GTX-330 transponder. So we have time covered in spades on this unique airplane.