14 CFR § 217.4 - Data collected (service classes).
(a) The statistical classifications are designed to reflect the operating elements attributable to each distinctive class of service offered for scheduled, nonscheduled and charter service.
(b) The service classes that foreign air carriers shall report on Schedule T-100(f) are:
(1) F Scheduled Passenger/Cargo
(2) G Scheduled All-Cargo
(3) L Nonscheduled Civilian Passenger/Cargo Charter
(4) P Nonscheduled Civilian All-Cargo Charter
(5) Q Nonscheduled Services (Other than Charter). This service class is reserved for special nonscheduled cargo flights provided by a few foreign air carriers under special authority granted by the Department.