The safety regulator has lashed national carrier Qantas over a “cascade of errors” that saw a 1.25-metre tool left in an engine for 300 hours of flying time. The safety regulator has lashed national carrier Qantas over a “cascade of errors” that saw a 1.25-metre tool left in an engine for 300 hours of flying time. Air Transport Industry, Travel and Tourism, Air and Space Accidents and Incidents Latest business news