Non-standard ATC practices and procedures unveiled by incident investigation

摘要

An unauthorized take-off by a Cessna 172 pilot who misunderstood an instruction from the tower controller produced a risk of collision with an Airbus A320 departing on an intersecting runway, and highlighted the need for improvements in ATC practices at the aerodromernAn unsafe situation arose at Quebec City Jean Lesage International Airport on the morning of 13 June 2004 when an Airbus A320 and Cessna 172 took off from intersecting runways at the same time. The vigilant airline crew delayed the rotation of their Airbus A320 after spotting the airborne Cessna on a crossing path. The report of the incident highlighted the need for safety measures with respect to air traffic control (ATC) and administrative procedures at the aerodrome, and also raised concerns over the use of certain ATC phraseologies that are open to misinterpretation by flight crews.