Definition
A numerical value, published by the airport authority, that expresses the load-bearing strength of a runway, taxiway, or apron pavement. The PCN is compared with an aircraft's Aircraft Classification Number (ACN) to determine whether the aircraft can operate on that pavement without causing damage. The PCN is published as a code that includes the numeric strength rating, the pavement type (rigid or flexible), the subgrade strength category, the maximum allowable tire pressure, and the evaluation method used.
Plain English
A number that tells you how much weight a runway or taxiway can handle. If the aircraft's matching number is equal to or lower than the pavement's number, the surface can take the aircraft.
Context Anchor
Seen on airport diagrams, airport legends, and airport information pages when pavement strength is listed for runways, taxiways, or parking areas.
Derivation
Pavement' refers to the prepared surface of the runway or taxiway. 'Classification' here means a rating or grading system. So the term is literally a number that grades the pavement's strength.
Why Pilots Care
Determines whether an aircraft can use a runway or taxiway without risking pavement damage.
Analogy
It is similar to a weight limit for a bridge: the number is not the bridge itself, but it helps you know whether the structure is strong enough for the vehicle using it.
Intuition Check
PCN is not a runway number, a pavement condition score, or a measure of how smooth the surface is. It is a strength rating for how much aircraft loading the pavement can handle.
Example Sentence 1
Before dispatching the heavy freighter to the smaller airport, the crew confirmed the runway PCN was high enough to accept the aircraft's ACN at planned weight.
Example Sentence 2
The pilot confirmed the runway PCN before operating the heavier aircraft.