Definition
An informal mnemonic used in aircraft maintenance and inspection training to remember the basic items checked during a routine inspection of an aircraft engine and airframe. The letters stand for: Studs, Oil, Manifolds, Exhaust, Throttle, Hoses, Ignition, Nuts, Generator, Baffles, Rocker boxes, Engine mount, Air intake, Knobs and switches, Spark plugs.
Plain English
A memory aid that helps a mechanic remember the parts to look at when inspecting an engine. Each letter in the phrase 'Something Breaks' stands for one item to check.
Context Anchor
Used in emergency training, maintenance discussions, accident reports, and cockpit decision-making when describing a failure that happens during flight or ground operation.
Derivation
The phrase is constructed so each letter triggers the recall of an inspection item. It works because 'something breaks' is an easy phrase to remember, and the worry that something on an aircraft might break is exactly what an inspection is meant to catch.
Why Pilots Care
Forces immediate assessment and possible diversion or landing to maintain safety.
Intuition Check
Do not assume “something breaks” means the airplane is automatically unflyable. It means a failure has occurred; the pilot must identify what still works, keep control, and choose the safest action.
Example Sentence 1
During the 100-hour inspection, the mechanic ran through the 'Something Breaks' checklist to make sure every engine item was covered.
Example Sentence 2
The pilot ran the emergency checklist after something breaks on the landing gear during rollout.