M 0.78 - You can use the one hour interval to coordinate with maintenance, local station management, and the like. You should also develop a full contingency plan for your RON just in case the APU is truly inop. Everyone has extra clothes in the bottom of their nav bag per company standard, right?
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Station management recently made me and the rest of the flight deck crew get off the plane and RON at an outlying station. Another crew would fly the next leg. By some strange twist of fate, I was the only one with RON clothes! Sure, the old BOM said we all have to bring them on every flight. The new FOM probably says the same thing somewhere. But you never need them, right? Now I never go anywhere, not even domestic flights, without RON clothes. I also bring a jacket on all regional flights north of MNL. It's starting to get cold up there.
