Definition
In aviation maintenance and human factors contexts, interventions are deliberate actions taken to prevent, correct, or mitigate an error, hazard, or unsafe condition before it leads to an incident or accident. They include procedural changes, training, supervisory action, equipment modifications, or direct corrective steps applied to a person, system, or process.
Plain English
An intervention is something you actively do to step in and fix a problem, or stop one from happening, before it gets worse.
Context Anchor
Seen in human factors, safety, training, and risk-management discussions, especially when talking about preventing errors from becoming accidents.
Derivation
From the Latin intervenire, meaning 'to come between.' An intervention literally comes between a developing problem and its outcome, stopping the chain before harm occurs.
Why Pilots Care
Most aviation accidents involve a chain of small errors. A timely intervention -- by a pilot, mechanic, controller, or supervisor -- breaks that chain. Recognizing when and how to intervene is a core safety skill.
Intuition Check
Do not read interventions as just outside interference. In aviation, an intervention is a useful action taken on purpose to stop or reduce a risk.
Example Sentence 1
After noticing the technician was fatigued, the supervisor's intervention was to reassign the task and require a rest break before resuming work.
Example Sentence 2
During the approach, quick interventions prevented the airspeed from dropping below the target.