A brasher warning is basically when you are given notice that you have made a mistake when you were piloting a plane. Essentially, you have the right to be aware that you are in trouble after making a mistake.
If an air traffic controller has determined that the actions of a pilot have affected the safety of operation, then it is the controller’s responsibility to notify the flight crew as soon as it is practical to do so. To do this, they will use the Brasher Notification Phraseology. This is usually in the following format:
(Aircraft identification) POSSIBLE PILOT DEVIATION, ADVISE YOU CONTACT (facility) AT (telephone number). This brasher warning is intended to provide the involved flight crew with the opportunity to make note of the incident that has taken place and gather their thoughts before it is discussed.
If you do receive a brasher warning, you should know that you do not have to call the provided telephone straight away, and you are allowed to take some time to think about the situation that has occurred. As well as this, you might want to consider making a call to an aviation attorney before you call the number that you have been provided with. This will help to ensure that you are fully prepared for whatever happens next.