This change deactivates the internal light in the memory device located on the pilot and co-pilot control column. The 

change was requested by the aircraft operator to deactivate the memory lighting due to a recent incident of smoke 

emanating from one of the memory devices and standardize their 737 fleet

You want to remove the non-mandatory memory device from your aircraft and simplify the maintenance of your aicraft while improving operational reliability.

Removal of non-mandatory system from the aicraft to improve operational reliability.