Definition
A structured procedure for calculating an aircraft's required takeoff or landing distance based on the actual conditions at the runway being used, including aircraft weight, runway length and slope, surface condition (dry, wet, contaminated with snow, slush, or ice), wind, temperature, and pressure altitude. The assessment compares the distance required to the distance available and is used to determine whether a takeoff or landing can be conducted safely on that specific runway under those specific conditions.
Plain English
A check the pilot or operator performs before takeoff or landing to work out how much runway the aircraft will actually need that day, given the weather, runway surface, and aircraft weight, and then compares that to how much runway is actually available.
Context Anchor
Pilots encounter this during preflight planning, runway condition reports, wet or contaminated runway operations, and takeoff or landing distance checks.
Derivation
“Performance” in aviation means what an aircraft can actually do under specific conditions, not how skillfully the pilot flies. “Assessment” means a careful judgment. Together, the phrase means a careful judgment of what the aircraft can do for takeoff or landing under the runway conditions that exist.
Why Pilots Care
Directly affects go/no-go decisions, required runway length, and braking action, helping prevent runway excursions.
Intuition Check
Do not read “performance” here as pilot performance or general aircraft quality. Here it means measured aircraft capability: how much runway the airplane needs to accelerate, land, slow, and stop under the current conditions.
Example Sentence 1
Before departing on a wet runway, the crew completed a takeoff and landing performance assessment to confirm they had adequate runway length for their weight.
Example Sentence 2
The airport issued an updated Takeoff And Landing Performance Assessment after clearing slush from the runway, allowing higher takeoff weights.