Definition
A sequence of related occurrences in which one event triggers the next, each step compounding the situation and often leading to an accident or incident. In aviation safety analysis, an event cascade describes how a minor problem, left unmanaged, can set off a chain of further problems that progressively reduce the pilot's options.
Plain English
A chain reaction of small things going wrong, where each one makes the next more likely or more serious. By the time the pilot recognises the pattern, the situation has often grown beyond easy recovery.
Context Anchor
Seen in aviation safety training, accident discussions, preflight risk reviews, and post-flight debriefs.
Derivation
From the French cascade, meaning a small waterfall, where water tumbles from one level to the next. Applied to events, it pictures one happening that spills into the next, then the next, gathering momentum as it goes.
Why Pilots Care
Recognizing an event cascade allows early intervention before small issues compound into an unrecoverable situation.
Analogy
An event cascade is like a row of dominoes. One falling piece can knock down the next, but removing or stopping one piece can prevent the rest from falling.
Grounding Statement
A flight may begin with one small issue, but if that issue causes rushed choices, missed checks, and poor decisions, the whole flight can become unsafe.
Intuition Check
Do not think of an event cascade as just a list of things that happened. The key idea is connection: each event helps cause or worsen the next one.
Example Sentence 1
The instructor used the accident report to show how a late departure, deteriorating weather, and an unfamiliar airport formed an event cascade that ended in a forced landing.
Example Sentence 2
Maintenance overlooked a small hydraulic leak, which led to an event cascade during flight when the system lost pressure and the landing gear failed to extend.