The Republic of Korea Air Force has resume partial flying operations for the KF-16 on Apr. 4. A ban was implement last week after a KF-16D crashed on Mar. 30.
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By Doo Ho Kim (http://www.flickr.com/photos/titicat/3810451257/) [CC BY-SA 2.0], via Wikimedia Commons
The news article said some jets remain grounded as they are powered by the same engine as the jet that crashed. This could be referring to the Block 30 aircraft that South Korea first bought under Peace Bridge I.