AR refers to parts or units that were removed from an aircraft and are now listed for sale. These could state a reason or occasionally be unrepairable after the product’s life.
RP - Repaired
RP refers to a product that has been repaired and might need some more work for optimum functionality. These parts are commonly used for functional tests compliance to use repaired parts and bring the unit to a serviceable stage.
OH - Overhauled
OH condition refers to the possible overhauling of the product or equipment. This could involve completely or partially disassembling the product and restoring it to an optimum/maximum level of functionality.
