Does not look like Russian. Patent US 5859765 A was issued October 1996 and is connected to Reinhold Grewe at Dornier Germany. Underlying German patents DE3243495C2 and DE3546403A1 date back as early as 1984. As far as I could research with little effort, quite some DO 2xx and DO 3xx were equipped with similar devices under the wings, as well as some american types to be able to distress even when the structure was broken. And as Somali Police Force used Do-28 Skyservants, my first bet would be a piece of one of them.
see i.e.
http://www.google.tl/patents/EP0768240A2?cl=en
Even the "69" marking can be found on stock photos for FDR:
http://www.dreamstime.com/stock-illu...-image42739668
can't be an uncommon device.