Cologne Bonn Airport (CGN) decides to extend safety assessment concerning strength of runway strips to runway end safety areas (RESA)
November 2017 | Safety Assessment
EASA’s directive CS-ADR-DSN provides specific requirements concerning the bearing strength of runway strips (California Bearing Ratio (CBR) value of 15 – 20) in order to minimize the hazard of an aircraft accidently running off the runway during veer off incidents/accidents. The analysis conducted within the safety assessment shall now be extended to all RESAs of the runway system. According to EASA GM1 ADR-DSN.C.235 the same bearing strength requirements mentioned above are valid for RESAs as well. The safety objective of RESAs is to minimize risks to aircraft (especially substantial damage to their nose landing gears) and their occupants when an aircraft overruns or undershoots a runway and additionally support appropriate bearing strength to decelerate the aircraft (reducing of accident location). Within the scope of the airport’s EASA certification the risk assessment methodology developed by GfL is applied. Besides that, further investigations will be carried out covering the risk of aircraft collisions with subsurface constructions. Overall objective is to provide evidence that safe aircraft operations can be guaranteed at Cologne Bonn Airport (CGN) even if there are potential guideline deviations.
