"Exchange" is a term used in aviation and most other parts industries to indicate the exchange of a known defective or unserviceable unit for a known good, serviceable unit. In most cases, in simple terms, exchanges are sought after when quick replacement of a defective unit is needed.

Southeast Aerospace's exchange price is based on a standard exchange.  Additional billing will only occur if the cost to repair the core received exceeds the repair cap. The "repair cap" is the maximum allowable cost to repair the customer core. If the cost to repair the core exceeds the repair cap, the customer will be billed an additional fee equaling the difference between the repair cost and the repair cap. If the additional fee exceeds or equals the core charge, the core will be deemed to be beyond economical repair and the core will be billed back to the customer at the original stated core charge amount indicated on the exchange invoice. A billback of the original core charge amount will also occur in the vent that a core is not returned.

A standard exchange is only valid with the return of an economically repairable, normal core of the same model and same part number. A definition of a normal, repairable core is a unit that has experienced a normal equipment failure not related to an incident (i.e. fire, water damage, or act of nature) or improper installation. Units that have been heavily modified or extensively, unproductively worked on are not accepted as exchange cores. In rare cases or situations, exchanges may be conditional based on the serial number or service bulletin threshold of a unit due to certain older units not being supported by the manufacturer.