Aircraft Classification Number
1
Aircraft Classification Number
Aircraft Classification Number (ACN) expresses the relative effect of an aircraft on a pavement
for a specific standard subgrade strength.
Aircraft can operate without restrictions on a certain pavement if both following conditions are
fulfilled:
−
ACN is equal to or lower than the Pavement Classification Number (PCN), and
−
Main gear tyre pressure is below the tyre pressure limit.
For more information, refer to
Determination of Allowed Operation on Runway
.
2
Pavement Type Code
Pavement Type Code expresses the bearing strength of a pavement for unrestricted operation
Pavement Type Code consists of five quantities.
Pavement Type Code
Pavement
Classification
Number (PCN)
A number expressing the bearing strength of a pavement for unrestricted
operation
Pavement Type
F (Flexible pavement, for example asphalt)
R (Rigid pavement, for example concrete)
Subgrade
Strength
A (high subgrade strength)
B (medium subgrade strength)
C (low subgrade strength)
D (ultra low subgrade strength)
Tyre Pressure
Limit
W (no tyre pressure limit)
X (tyre pressure limited to 218 psi)
Y (tyre pressure limited to 145 psi)
Z (tyre pressure limited to 73 psi)
Note
The PC-24 nose and main gear tyres have a service pressure of 58
respectively 73 psi (loaded). Therefore the PC-24 will never be tyre
pressure limited.
PCN Evaluation
Method
T (technical evaluation)
U (using aircraft experience)
An example of a Pavement Type Code is: PCN 20 / F / C / Y / T.
Section 0 - Introduction
Ground Servicing Guide
Report No: 02484
Issue date: Nov 30, 2020
Page 0-2-1
PC24-A-A15-12-0001-00A-030A-A