Braking action

Braking action in aviation is a description of how easily an aircraft can stop after landing on a runway. Either pilots or airport management can report the braking action according to the U.S. Federal Aviation Administration.

When reporting braking action, any of the following terms may be used: Good; Medium; Poor; Nil - bad or no braking action. If an air traffic controller receives a braking action report worse than good, a Pilot Report (PIREP) must be completed and an advisory must be included in the Automatic Terminal Information Service ("Braking Action Advisories are in effect"). As of October 2019, the FAA has used mu values to describe braking conditions