Upon hearing a mechanic refer to him as "my" pilot, the author reflected on the result of that feeling of connection between pilot and mechanic. "I am my Brother's keeper. I am his pilot. And he is my mechanic. We have an obligation to one another that doesn't quite translate into the written word found in the "Responsibilities" section of the SOP. But that ownership, that obligation to take care of each other, I'm convinced, is the chief reason why the Crash Investigation Kit gets dusty each month."