Definition
A sequence of small, individually minor errors or poor decisions that build on one another during a flight, each one narrowing the pilot's remaining options and increasing the likelihood of an accident. Recognizing and breaking the chain at any link can prevent the final outcome.
Plain English
A series of small bad choices that link together. On their own each one seems harmless, but stacked up they lead toward an accident. Spotting one link early and fixing it usually stops the whole chain.
Context Anchor
Used in pilot decision-making, safety training, accident discussions, and post-flight review when looking at how several small choices combined into a larger problem.
Derivation
The 'chain' image comes from the idea that no single link causes the failure -- it is the connected series. Aviation safety literature borrowed this from accident-investigation work showing that crashes almost never have one cause; they have a sequence.
Why Pilots Care
Recognizing the chain early allows a pilot to stop the sequence before it ends in an incident or accident.
Analogy
Like a line of dominoes where each falling piece pushes the next one over.
Grounding Statement
A pilot who skips planning, ignores worsening conditions, and keeps going because they feel rushed is building a Poor Judgment Chain one link at a time.
Intuition Check
Do not assume a Poor Judgment Chain means the pilot is careless or a bad person. In aviation, it means a connected pattern of decisions is increasing risk, and the pattern needs to be interrupted.
Example Sentence 1
The accident report described a classic poor judgment chain: a late departure, deteriorating weather, an unfamiliar airport, and fatigue, none fatal alone but lethal together.
Example Sentence 2
Recognizing fatigue as the start of a poor judgment chain helped the pilot decide to delay the flight.