AVweb Pilot Deviations Nobody wants to hear (or say), “Possible Pilot Deviation.” But, it happens. Here’s some advice from the ATC side on the process and the best way to handle it. Simply fly long enough and you’ll eventually make a boneheaded or innocent mistake that gets in ATC’s way. Those may say a Pilot Deviation (PD) is where they “screwed up” or “ATC is blaming me for…” I’ve personally heard it put in many different—often creative—ways; I should keep a list. Here is how the FAA defines it in FAA Order 8020.11D, “Aircraft Accident and Incident Notification, Investigation, and Reporting;” Chapter 1, “General Information;” Paragraph 7, Definitions: “