BUZZ-Bombardier Inc: CSeries jet completes 80 pct certification tests
** Canadian plane and train maker's shares up 6 pct at C$1.26
** Company says its new CSeries jet completed more than 80 pct of certification tests
** CS100 aircraft, currently undergoing noise testing, is expected to meet targets, making it quietest commercial jet in production, company says
** Passengers also flew onboard jet for first time, Bombardier says
** Company said in February it was confident aircraft would be certified in second half of 2015
** Up to Wednesday's close, stock had fallen about 71 pct this year
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