Originally Posted by discoverCSG

DFW-NRT is flying with refurbished 772's.
By rights (and common sense), if this flyer accepts the downgrade to J, he/she is due the mileage difference between F and J pre-devaluation. There should be no question, but (as very frequently discussed on this board), many agents don't know this/are too lazy to look into this, so one must HUACA until one gets the correct answer, or else escalate to a supervisor.