combi

Combi aircraft in commercial aviation are aircraft that can be used to carry either passengers as an airliner, or cargo as a freighter, and may have a partition in the aircraft cabin to allow both uses at the same time in a mixed passenger/freight combination. The name combi comes from the word combination. The concept originated in railroading with the combine car, a passenger car that contains a separate compartment for mail or baggage.
Combi aircraft typically feature an oversized cargo door, as well as tracks on the cabin floor to allow the seats to be added or removed quickly.
Typically, configured for both passenger and cargo duty, the passenger compartment is pressurized to a higher pressure, to prevent potential fumes from cargo entering the passenger area.

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