--- title: "CS ADR-DSN.T.900 – CS ADR-DSN.T.921: CHAPTER T — AERODROME OPERATIONAL SERVICES, EQUIPMENT AND INSTALLATION (Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes) — rule index · Avioverse" description: "CS ADR-DSN.T.900 – CS ADR-DSN.T.921, Regulation (EU) No 139/2014. Emergency access roads and service roads should be equipped with a road-holding…" url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment" --- # CHAPTER T — AERODROME OPERATIONAL SERVICES, EQUIPMENT AND INSTALLATION Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Aerodromes · Regulation (EU) No 139/2014 · CS ADR-DSN.T.900 – CS ADR-DSN.T.921 On this page 1. ## [CS ADR-DSN.T.900 Emergency access and service roads](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-900) Emergency access roads and service roads should be equipped with a road-holding position, in accordance with CS ADR-DSN.L.600, CS ADR-DSN.M.770 and CS… 2. ## [GM1 ADR-DSN.T.900 Emergency access and service roads](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-900) Service roads at air side are installed to support all apron processes. 3. ## [CS ADR-DSN.T.905 Fire stations](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-905) All rescue and firefighting vehicles should normally be housed in a fire station. 4. ## [GM1 ADR-DSN.T.905 Fire stations](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-905) intentionally left blank 5. ## [CS ADR-DSN.T.910 Equipment frangibility requirements](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-910) Equipment and structures should be so designed to meet the appropriate frangibility characteristics, when required. 6. ## [GM1 ADR-DSN.T.910 Equipment frangibility requirements](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-910) Equipment and supports required to be frangible should be designed and constructed so that they should break, distort, or yield in the event that they… 7. ## [CS ADR-DSN.T.915 Siting of equipment and installations on operational areas](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-915) Equipment and installations should be sited as far away from the runway and taxiway centre lines as practicable. 8. ## [GM1 ADR-DSN.T.915 Siting of equipment and installations on operational areas](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-915) The design of light fixtures and their supporting structures, light units of visual approach slope indicators, signs and markers is specified in CS… 9. ## [CS ADR-DSN.T.920 Fencing](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-920) The safety objective of fencing is to prevent animals or unauthorised persons that could be a safety risk to aircraft operations, to enter the aerodrome. 10. ## [GM1 ADR-DSN.T.920 Fencing](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-920) The fence or barrier should be located so as to separate the movement area and other facilities or zones on the aerodrome vital to the safe operation of… 11. ## [CS ADR-DSN.T.921 Autonomous runway incursion warning system (ARIWS)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/cs-adr-dsn-t-921) Applicability: The inclusion of detailed specifications for an ARIWS is not intended to imply that an ARIWS has to be provided at an aerodrome. 12. ## [GM1 ADR-DSN.T.921 Autonomous runway incursion warning system (ARIWS)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-t-aerodrome-operational-services-equipment/gm1-adr-dsn-t-921) The implementation of autonomous systems are generally quite complex in design and operation and, as such, deserves careful consideration by all involved… Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 13 Oct 2026) for convenience. 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