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Predator crash due to coolant leak
Washington, USA - Maintainers did not recognize handoff errors
The Predator MQ-1 drone-aircraft crashed on 30 January 2012 outside the Kandhahar base in Afghanistan. According to international press reports and to a US Air Force report released on 29 May, the accident was caused by an engine coolant leakage and maintenance errors. "A new Rotax engine was installed in the aircraft in July 2011, it was installed in such a way that the engine coolant line chafed...
AVIONEWS - World Aeronautical Press Agency