Boeing gives lung cancer to Attack HELO Crew.

http://fhp.osd.mil/du/environmentalEffects.jsp --
Journal of Environmental Radioactivity; 64:93-112 (2003) -PDF's page 64 !
Properties, use and health effects of depleted uranium (DU): a general overview,
Bleise, Denesi and Burkart, A. Bleise et al.
(I downloaded the "PDF" and Page 64 is where this information can be found)

Depleted uranium was also used as counterweights for rudders and flaps in commercial aircraft and fork lifts, and in the keels of sailing yachts.

In the aircraft crash that occurred in Amsterdam on 4th October 1992,
DU was used as a counterweight. DU was released into the environment (Uijt de Haag et al. (2000). (a Boeing airliner and they removed all DU out of every airliner they ever made. The 2009 Apache Longbow Attack HELO uses DU Penetrators!)

http://fhp.osd.mil/du/environmentalEffects.jsp -- Journal of Environmental Radioactivity