Depleted Uranium Advisory

FAA Advisory Circular 20-123, dated 12/20/84 is entitled "Avoiding or Minimizing Encounters With Aircraft Equipped With Depleted Uranium Balance Weights During Accident Investigations." The two-page memo was written to warn FAA crash site investigators that, as a result of an air crash, DU weights in various parts of the aircraft might have had their cadmium plating removed.

The memorandum states, "While the depleted uranium normally poses no danger, it is to be handled with caution. The main hazard associated with depleted uranium is the harmful effect the material could have if it enters the body. If particles are inhaled or digested, they can be chemically toxic and cause a significant and long-lasting irradiation of internal tissue."

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