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Implementation Guidance Information



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Eurocontrol CDA Implementation Guidance Information An Overview Environmental Working Group December 5 2007 Participants Airbus Air France Airports Council International Europe British Airways Bucharest Henri Coanda Airport Department of Transport Romania DFS Germany DGAC France IATA LFV Sweden LVNL Netherlands Manchester Airport NATS UK Romanian CAA ROMATSA Romania SAS Scandinavian Airlines Stockholm Arlanda Airport TAROM UK Civil Aviation Authority Scope and Objective The guidance is intended to facilitate harmonised implementation of CDA at aerodromes in the ECAC area The objective of a CDA is to reduce aircraft noise fuel burn and emissions by means of a continuous descent so as to intercept the approach glide path at an appropriate height for the distance to touchdown Scope and Objective Definition A CDA is an aircraft operating technique in which an arriving aircraft descends from an optimal position with minimum thrust and avoids level flight to the extent permitted by the safe operation of the aircraft and compliance with published procedures and ATC instructions Keeping aircraft as high as possible for as long as possible can be more effective at reducing noise impact on the ground than Low Power Low Drag LP LD techniques alone LP LD is a noise abatement technique for arriving aircraft in which the pilot delays the extension of wing flaps and undercarriage until the final stages of the approach Scope and Objective CDA will be most appropriately deployed where an aerodrome has existing or potential noise issues typically where noise sensitive areas are being over flown at medium altitude by arriving aircraft However the application of CDAs may be extended to all airports as a means of reducing the environmental impact of aviation Increases in traffic density may require ATC support tools to continue the use of CDAs Collaboration and Culture Successful and safe implementation of CDA requires effective collaboration and communications among the aerodrome



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