Definition
Mismatches between the airplane's current state of energy (airspeed plus altitude) and the state required for the current phase of flight, resulting from improper management of pitch, power, or both. An energy error exists when the airplane has too much or too little total energy, or has the right total but the wrong distribution between airspeed (kinetic energy) and altitude (potential energy) for the situation.
Plain English
Times when the airplane has too much speed, too little speed, too much height, or too little height for what the pilot is trying to do — usually because pitch and power were not handled together correctly.
Context Anchor
Seen in approach, landing, go-around, and maneuvering discussions when judging whether the airplane is on the right speed and path.
Derivation
Energy comes from a Greek word meaning activity or work. Error comes from a Latin word meaning to wander or stray. Together, the term points to the airplane’s speed-and-height condition straying from what the flight situation needs.
Why Pilots Care
Uncorrected energy errors produce unstable approaches that can lead to runway overruns, hard landings, or the need for a go-around.
Analogy
Think of speed and height like money in an account. Too much or too little for the next step creates a problem; the pilot’s job is to manage what is available before it is needed.
Grounding Statement
On final approach, an energy error is the moment you realize the airplane is not carrying the right combination of speed and height to reach the intended touchdown area smoothly.
Intuition Check
Do not read “energy errors” as a vague mistake or a math concept. In flying, it means the airplane’s speed-and-height condition does not match what the maneuver or flight path needs.
Example Sentence 1
Arriving over the runway threshold high and fast, the pilot recognized the energy error and went around rather than trying to salvage the landing.
Example Sentence 2
Recognizing an energy error early in the pattern allowed a smooth adjustment rather than a rushed landing.