AIRPLANE
OPERATIONS
MANUAL
PERFORMANCE
EMB-145 LB
REVISION 40
1-04-20
Page
13
Code
02
AIRCRAFT CLASSIFICATION NUMBER - ACN
The Pavement Classification Number (PCN) reported shall indicate
that an airplane with ACN equal to or less than the reported PCN can
operate on that pavement.
PCN - PAVEMENT CLASSIFICATION NUMBER
Example: PCN 50 / F / A / X / T
AOM-145/1114
1 2 3 4
1 - Type of pavement:
R = Rigid (concrete) F = Flexible (asphalt)
2 - Pavement sub-grade strength category:
A = High, B = Medium, C = Low, D = Ultra-low.
3 - Maximum tire pressure authorized for the pavement:
W = High, no limit; X = Medium (up to 217 psi)
Y = Low (up to 145 psi); Z = Very low (up to 73 psi)
4 - Pavement evaluation method:
T = Technical evaluation;
U = By experience of airplane actually using the pavement.
OVERLOAD OPERATIONS
Individual airport authorities are free to decide on their own criteria for
per
mitting o
verload operations as long as pavements remain safe for
use by airplane. However, a 10% difference in ACN over PCN for
flexible pavement and 5% for rigid pavements is generally accepted,
provided that overload operations do not exceed 5% of the annual
departures and are spread throughout the year.
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