Aircraft Classification Number (ACN) 1
Aircraft Classification Number (ACN) 1 : (ICAO) A number expressing the relative effect of an aircraft on a pavement for a specified standard subgrade category. Note: ACNs are expressed on a scale from approximately 5 (least demanding aircraft) to 110 (most demanding aircraft). ACNs are applicable only to aircraft having an apron (ramp) mass equal to or greater than 12 600 lb. ACNs have been assigned to present-day aircraft at their maximum and minimum operating masses/weights and at a specific tire pressure. The ACN should not exceed the pavement classification number (PCN) for unrestricted aircraft operations. The ICAO ACN system is the internationally approved and accepted method for ranking aircraft in terms of their pavement-strength requirements. See also: Aircraft Load Rating (ALR)
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