The Luftwaffe has been forced to ground 39 of its Tornado fighter bombers, including six that are deployed to Turkey, after it was determined that an electronic component in the cockpit has a faulty screw.
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By Airwolfhound from Hertfordshire, UK (Panavia Tornado PA-200 – RIAT 2015) [CC BY-SA 2.0], via Wikimedia Commons
The fault can only be rectified by the equipment manufacturer.