Notching Drain Lines?
I can't find anything about the practice of notching drain lines. I have a screenshot from user "Rotax Wizard" that I think is about 2 years old, but I can't find it in the forum, or in my AC-43-1B. He says: "Common practice for all drain lines is to notch the line somewhere within the nacelle before it exits into any low-pressure area."
Any details on this?
Thanks,
Mike