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In page Mikoyan-Gurevich MiG-21:

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On 4 March 2017, a Syrian MiG-21bis from No. 679 squadron, operating out of Hama Airbase and piloted by Col. Mohammad Sawfan, was shot down by Ahrar al-Sham rebels, crashing in Turkish territory near the border. Col. Sawfan successfully ejected but was arrested and taken to a hospital in Antakya, Turkey. A recording between the pilot and ground controller clearly showed Sawfan's disorientation due to a malfunctioning compass, followed by a failure of the entire navigation system. He could not find his way back to base as ordered and inadvertently flew within range of rebel anti-aircraft guns.[citation needed] After being suspended for a number of years, Sawfan was allowed to return to service.