Direction générale de l'aviation civile (DGAC)

Service technique de l'aviation civile

Technical Information

In order to support the Aerodrome Design Working Group reviewing of ICAO taxiway to object separation standards, a statistical study about ICAO code C taxiway separations was undertaken by the French Civil Aviation Technical Centre (STAC).

The study aimed at assessing risks associated with current code C taxiway separations, using deviation data collected on code E taxiways at Charles-de-Gaulle Airport (LFPG). The study used statistical extreme values analysis to calculate overrunning and aircraft-object collision probabilities, in order to determine associated risk levels.

Results were compared with an FAA/Boeing Cooperative Research and Development Agreement (CRDA) study about ADGIII / ICAO code C taxiway separations, and with an analysis of taxiway excursion reports from 1980 to 2011.

The study showed that the current code C taxiway to object separation is safe, and that for both French and FAA study risk models based on extreme value theory appear conservative compared to accidentology.

pdf file

Editor STAC
Publication year 2014
Format A4
Pages number 8
Price printed version Free