Complex sentence: The DC-8 was led to Burevestnik airfield on Iturup (Etorofu) Island, a small Soviet PVO interceptor base, landing at 7:39 pm, on the 2400 m (7900 ft) concrete runway.
Split into simpler sentences: The DC-8 was led to Burevestnik airfield on Iturup (Etorofu) Island, a small Soviet PVO interceptor base. It did so at 7:39 pm, touching down on the 2400 m (7900 ft) concrete runway.