A "pilot deviation" occurs when a pilot violates any of a certain set of rules outlined by the Federal Aviation Administration, something they want to avoid.

A "Brasher warning" is air traffic control's immediate notification to a pilot about a possible pilot deviation, such as being at the wrong altitude. It is named after Captain Jack Brasher, whose 1985 ...

If you are not an aviation professional, you may not be familiar with the term pilot deviation (PD). Basically, if air traffic control (ATC) calls a pilot on the radio in flight and asks them to “copy ...