Definition
A category of in-flight emergency in which a part of the engine installation — such as the engine itself, the propeller, the induction system, the exhaust system, the fuel system, the ignition system, or engine instruments — stops working correctly or fails outright. Recognition and response are covered in pilot training because the appropriate action depends on which component has failed and how it is behaving.
Plain English
Something in the engine or its supporting systems has broken or stopped working properly during flight. The pilot has to identify what failed and follow the correct procedure for that specific problem.
Context Anchor
Seen in maintenance write-ups, accident or incident discussions, and troubleshooting when the problem is traced to the engine or its related equipment.
Derivation
Powerplant combines power with plant. Here, plant does not mean a factory; it means machinery or equipment. In aviation, the powerplant is the machinery that provides the aircraft’s power.
Why Pilots Care
These failures can cause sudden loss of thrust, forcing an immediate decision to troubleshoot, declare an emergency, or execute a forced landing.
Intuition Check
Do not assume this means the entire engine has stopped. It can also mean one part of the powerplant system has failed or is not working normally.
Example Sentence 1
The training syllabus included a section on system component failure of the powerplant, covering everything from a rough-running magneto to a loss of oil pressure.
Example Sentence 2
During the post-flight debrief the instructor reviewed how a system component failure of the powerplant could have been caught on the preflight inspection.