Flight inspection of the instrument landing system

In the period from 26 to 29 September 2019, calibration flights to check the instrument landing system (ILS) of runway northwest at Frankfurt Airport will be conducted. A calibration aircraft especially equipped for this purpose will check the precision of the signals which are essential for safe landings. Both operating directions of the runway will be tested, i.e. approaches from the east as well as from the west.

24.09.2019.- On these days, the calibrations will begin at 23:00 hrs and last until approximately 03:00 hrs on the following day. Should there be any delays due to technical reasons or the weather, the calibration flights will have to be continued at a later date, i.e. between 18 and 22 October 2019.

Due to the high traffic volume at Frankfurt Airport during the day, it is necessary to conduct calibration flights during the night. The calibration aircraft being used is a small turboprop Beechcraft Super King Air 350. Overflights of built-up areas will be avoided as far as possible and as far as the specified flight profiles permit.

The instrument landing system provides navigational support for pilots during approach. The basic principle is that signal transmitters on the ground electronically define the approach course and glide path angle. The signals are received in the aircraft and displayed to the pilot in the cockpit. Only calibration aircraft that are specially equipped for this purpose are able to check the precision of these signals. 

The International Civil Aviation Organisation (ICAO) prescribes the calibration of the instrument landing system at regular intervals. This is crucial for the safe, orderly and expeditious handling of air traffic at airports.

Media contact:
Ute Otterbein / Kristina Kelek
Telephone: +49 (0)6103 / 707-4162 / 4162

DFS Deutsche Flugsicherung GmbH, the German air navigation service provider, is a State-owned company under private law with 5,500 employees as at 30 June 2019. DFS ensures the safe and punctual flow of air traffic over Germany. Around 2,000 air traffic controllers guide up to 10,000 flights in German airspace every day, more than three million movements every year. This makes Germany the country with the highest traffic volume in Europe. The company operates control centres in Langen, Bremen, Karlsruhe and Munich as well as control towers at the 16 designated international airports in Germany. The subsidiary DFS Aviation Services GmbH markets and sells products and services related to air navigation services, and provides air traffic control at nine regional airports in Germany and at London Gatwick Airport and Edinburgh Airport in the UK. DFS has been working on the integration of drones into air traffic since 2016 and has set up a joint venture, Droniq GmbH, with Deutsche Telekom. www.dfs.de