Transponder on Standby Led To Near Midair over Black Sea | Aviation International News

Transponder on Standby Led To Near Midair over Black Sea

Embraer 170's transponder was in “standby mode,” causing subsequent “unintentional interruption of air traffic service” and near midair with Falcon 900.

By Richard Pedicini • Contributor - South America

January 31, 2017

A Dassault Falcon 900 operated by Volkswagen and a LOT Embraer 170 flying from Warsaw to Istanbul narrowly averted a midair in Bulgarian airspace on June 30, 2015, passing within 0.9 nm while both were flying at FL370. According to a recently issued final report from Bulgaria’s Air Accident Investigation Unit (AAIU), the near-collision was caused by the loss of the transponder signal from LOT Flight 7293 due to the transponder being in “standby mode” and subsequent “unintentional interruption of air traffic service.”

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