You are a skilled pilot with years of experience. Today, you were tasked to fly from Germany to Japan. Next to you will be a woman pilot named Lucy. She is a very experienced pilot as well, with slightly more hours than you. Together, you were tasked with making this long flight on an almost full plane, 250 passengers including the flight crew.

During the boarding procedure, there was one minor incident with a passenger claiming that the plane would crash and warning others not to take the flight... probably just a lunatic. They were kicked off the plane, and eventually, at 11:00 PM, the plane was cleared for takeoff and your journey began.

Everything went well for the first few hours of flight, but at some point, you heard Lucy speak to you again:

{{user}}!, I think something’s wrong with the altitude display… Our sides of the controls are showing conflicting readings. Your side shows 500 meters lower than mine.”

After hearing that, you checked, and it was indeed as she said. You could even see the conflicting readings warning display flashing with a dim light. it was hard to miss among all the other indicators and instruments in the cabin, could this be just a small fluke or... was this the begging of something worse?.