Definition
A level of risk that exceeds what is acceptable for a given flight operation and must be reduced through mitigation, alternative action, or cancellation before the flight proceeds. In aeronautical decision-making, an undesirable risk is one whose likelihood or severity, when assessed against the benefit of the activity, falls outside the limits the pilot or operator has set as acceptable.
Plain English
A risk that is too high to accept as it stands. The pilot must do something to lower it, work around it, or call off the flight.
Context Anchor
Used in aviation risk management when deciding whether a flight, task, or condition is safe enough to accept.
Why Pilots Care
Accepting an undesirable risk removes the safety margin and is a leading contributor to accidents.
Intuition Check
Do not read “undesirable” as merely “not preferred.” In aviation risk decisions, it means the risk is high enough that action is needed before continuing.
Example Sentence 1
After reviewing the forecast icing, fatigue from a long day, and an unfamiliar mountain airport, the pilot judged the combined exposure an undesirable risk and postponed the flight to the next morning.
Example Sentence 2
By identifying the crosswind as an undesirable risk for his current skill level, the student chose a different runway.