Definition
The set of numerical values describing how an aircraft is performing at a given moment, including airspeed, altitude, heading, attitude, vertical speed, and power settings. These values are read from the flight instruments and used by the pilot to control the aircraft and confirm it is doing what is intended.
Plain English
The numbers your instruments are showing you right now about how the aircraft is flying — how fast, how high, which way, climbing or descending, and so on.
Context Anchor
Seen in the Pilot's Operating Handbook, Airplane Flight Manual, flight planning, and instrument training when choosing power settings, speeds, and expected climb or descent results.
Derivation
Performance comes from older words meaning to carry out or complete an action. Data comes from Latin meaning things given. Together, performance data means the given facts about what the airplane can carry out or achieve.
Why Pilots Care
Determines safe operating limits, required distances, and climb performance so pilots can make correct go/no-go decisions and avoid runway overruns or terrain conflicts.
Intuition Check
Do not read performance data as a judgment of how well the pilot is flying. Here it means the aircraft’s expected capability, based on published conditions and numbers.
Example Sentence 1
The pilot scanned the panel and used the performance data to confirm the aircraft was holding altitude and heading.
Example Sentence 2
Using the performance data, the pilot calculated the exact ground roll needed for takeoff on the short runway.