ACN and PCN

Question 1

What’s PCN?

Answer 1

The maximum tyre pressure that a pavement can withstand

Question 2

What’s 1 ACN?

Answer 2

Single wheel supports a mass of 500Kg at a tyre pressure of 181.25 psi

Question 3

What’s the principle of comparing ACN to PCN?

Answer 3

ACN must be less than or equal than to the PCN

Question 4

What’s the % by which an aircraft’s ACN can exceed the PCN for flexible and rigid or composite pavements?

Answer 4

10% above reported PCN for flexible and
5% above reported PCN for rigid or composite

Question 5

By how much can the annual number of overload movements be exceeded?

Answer 5

5% of the total annual aircraft movements