Stay informed on COVID-19 updates from EASARead more

European Operators Flight Data Monitoring (EOFDM) forum

What is EOFDM?

The European Operators Flight Data Monitoring (EOFDM) forum is a voluntary partnership between European Operators and the European Union Aviation Safety Agency (EASA) in order to:

  • Facilitate the implementation of Flight Data Monitoring (FDM) by Operators
  • Help operators draw the maximum safety benefits from an FDM Programme

Who can participate in the working groups?

Depending on the working groups (WGs) the following organisations may participate:

  • Operators
  • Operator associations
  • Flight-crew associations
  • Aircraft Manufacturers
  • Flight-data-monitoring software vendors
  • Research and educational institutions
  • Regulators (national aviation authorities and international aviation regulators)
  • European Aviation Safety Agency (EASA)

Non-european organisations are encouraged to join this safety initiative.

How are EOFDM working groups organised?

Steering group

Strategic decisions and coordination of the work produced. Composed by the leaders of the Working Groups (Industry) and the Secretaries of the Working Groups (EASA).

Download generic terms of reference (ToRs)

Working Group A - “Monitoring operational safety issues”

Scope and Objectives

  • Define relevant common risks, safety defences and related operational issues to be monitored by FDM programmes (eg. inappropriate reactions to TCAS RA, unstabilised approaches, hard landings, etc.) in order to support operators’ SMS programmes. The selected operational safety issues will refer whenever possible to ICAO/CAST aviation occurrence categories.
  • Develop the basis for detailed FDM related implementations to be performed by Working Group B.

Working Group A activities

  • Risk areas addressed:
    - Runway Excursions (RE)
    - Loss of Control In Flight (LOCI)
    - Controlled Flight Into Terrain (CFIT)
    - Mid-Air Collision (MAC), Publication expected by the second quarter of 2018
    See publications
  • Teleconferencing is the preferred working method, convened ad hoc as necessitated by the work.
  • One annual face-to-face meeting

Download WGA Terms of Reference (ToRs)


Working Group B - “Programming and equipment related aspects”

Scope and objectives

  • Define and test FDM events needed for monitoring operational issues as defined by EOFDM WGA.
  • Identify useful techniques to investigate flight data, either for automatic analysis (managing bad recordings, defining flight phase, etc) or for manual analysis (data mining, data presentation, correlation with other data sources).
  • Define parameters and their characteristics (e.g. sampling rate, recording resolution, accuracy, etc.) needed to: define FDM events, conduct data analysis and make flight measurements.
  • Investigate aircraft DAR/QAR related issues (data format, parameter sampling rate, data frame layout documentation, aircraft related hardware and software issues).
  • Look for ways to improve the interoperability between equipment available on the market, including ground FDM replay and airborne equipment.
  • Provide and update the overview of technical solutions (hardware and software) and of their comparative performance.

What are the activities of WGB?

  • Current topic:
    Controlled Flight Into Terrain (CFIT). Definition of Algorithms to integrate Terrain Databases with Flight Data.
  • Previous topics:
    - Runway Excursion (RE)
    - Loss of Control In Flight (LOCI)
    The documentation from WGB was aggregated during 2017 in a single document named “Guidance for the implementation of FDM Precursors
    See publications
  • Teleconferencing is the preferred working method, convened ad hoc as necessitated by the work
  • One annual face-to-face meeting.

Download WGB Terms of Reference (ToRs)


Working Group C - “Integration of the FDM programme into operator’s processes”

Scope and objectives of WGC?

  • Compile best practice intelligence and develop guidance material for the integration of Flight-Data Monitoring into an operator’s Safety Management System (SMS).
  • Provide guidance that will help an operator to best manage:
    • Limited resources;
    • The relationships with top-management and unions;
    • The application of “just culture” or “safety culture” with reference to the use of FDM data;
    • The use of FDM to its fullest extent to support risk management and safety-monitoring activities within operators;
    • The balance between ensuring confidentiality and the use of data for adequate analysis and follow-up of safety issues.
  • Identify best practice with regards to data handling:
    • During day-to-day operations (transfer from the aircraft to the ground, handling of memory media, etc.);
    • Long-term: storage of data in a secure way and de-identification of data.

What are the activities of WGC?

  • Current Topic:
    Drafting of ‘Breaking the silos’, which will address combining FDM with other data sources and going beyond conventional use of FDM data. Publication expected in 2019.
  • Previous topics:
    - Key Performance Indicators for an FDM Programme
    - Memorandum of understanding for an FDM Programme
    See publications
  • Teleconferencing is the preferred working method, convened ad hoc as necessitated by the work
  • One annual face-to-face meeting

Download WGC Terms of Reference (ToRs)



For any queries concerning EOFDM, please contact: fdm [at]


Publications / Documents

Disclaimer: The documentation provided on this webpage results from the cooperative work performed by EOFDM members. It is industry good practice resulting from the experience on FDM from the working groups members, and it should not be confused with guidance material or acceptable means of compliance to EU rules.