1.   The Air Traffic Incident

1.1   “Air traffic incident” is used to mean a serious occurrence involving air traffic such as:
  1. aircraft proximity;

    Note: Aircraft proximity is a situation in which, in the opinion of a pilot or air traffic services personnel, the distance between aircraft as well as their relative positions and speed have been such that the safety of the aircraft involved may have been compromised. An aircraft proximity is classified as follows:

    1. Risk of collision. The risk classification of an aircraft proximity in which serious risk of collision has existed.
    2. Safety not assured. The risk classification of an aircraft proximity in which the safety of aircraft may have been compromised.
    3. No risk of collision. The risk classification of an aircraft proximity in which no risk of collision has existed.
    4. Risk not determined. The risk classification of an aircraft proximity in which insufficient information was available to determine the risk involved, or inconclusive or conflicting evidence precluded such determination.
  2. serious difficulty caused by:
    1. faulty procedures or lack of compliance with applicable procedures or
    2. failure of ground facilities.
1.2   Air traffic incidents are designated and identified in reports as follows:

Air traffic incident


as a) above

Aircraft proximity

as b) 1) above


as b) 2) above


2.   Use of the “Air Traffic Incident Report Form”

2.1.  The “Air Traffic Incident Report Form” is indented for used:
  1. by a pilot for filing a report on an air traffic incident after arrival or to confirm a report made initially by radio during flight;
  2. by an ATS unit for recording an air traffic incident report received by radio, telephone or teleprinter.

3.   Reporting of Air Traffic Incident by pilot

3.1.  A pilot should proceed as follows regarding an incident in which he/she is or had been involved:
  1. During flight use the appropriate air/ground frequency for reporting an incident of major significance, particularly if it involves other aircraft, as to permit the facts to be ascertained immediately;
  2. As promptly as possible after landing submit a completed “Air Traffic Incident Report Form”;
    1. for confirming a report of an incident made initially as in a) above or for making the initial report on such an incident if it had not been possible to report it by radio;
    2. for reporting an incident which did not require immediate notification at the time of occurrence.
3.2.  An initial report made by radio should contain the following information:
  1. Aircraft identification of the aircraft filing the report;
  2. Type of incident: e.g. AIRPROX;
  3. Date/time of incident (in UTC) and position;
  4. Heading and route, true air speed (measured in KT or KM/H), level/altimeter setting (use FL, Feet/QNH or QFE as appropriate) level flight, climbing or descending, avoiding action taken (yes or no);
  5. Type and call sign / registration of the other aircraft (if known). If not known, described the aircraft: High, mid, low wing or rotor craft. Number of engines: 1, 2, 3, 4 or more than 4. Marking, colour or other available details. Heading (if known), controlling unit and frequency. Level: level flight, climbing, descending or unknown. Avoiding action taken: Yes, no or unknown;
  6. Closest horizontal and vertical distance;
  7. Description of other aircraft, if relevant.
3.3.  The confirmatory report on an incident of major significance initially reported by radio or the initial report on any other incident should be submitted to

Civil Aviation Safety Board


H-1675 Budapest P. O. Box. 41/1.

or to the ATS Reporting Office of the aerodrome of first landing for submission to the above address. The pilot should complete Sections I and II supplementing the details of the initial reports as necessary.

Note: Where there is no ATS Reporting Office the report may be submitted to another ATS unit.

4.   Handling of Air Traffic Incident Report Form

4.1.  The purpose of the form is to provide investigatory authorities with as complete information on an air traffic incident as possible and to enable them to report back with the least possible delay to the pilot or operator concerned the result of the investigation of the incident and, if appropriate the remedial action taken.

Instructions for the completion of the Air Traffic Incident Report Form

AAircraft identification of the aircraft filing the report.
BAn AIRPROX report should be filed immediately by radio.
C1Date/time UTC and position in bearing and distance from a navigation aid or in LAT/LONG.
C2Information regarding aircraft filing the report, tick as necessary.
C2 c)E.g. FL 350/1 013 hPa or 2 500 ft/QNH 1 007 hPa or 1 200 ft/QFE 998 hPa.
C3Information regarding the other aircraft involved.
C4Passing distance - state units used.
C6Attach additional papers as required. The diagrams may be used to show aircraft's positions
D1 f)State name of ATS unit and date/time in UTC.
D1 g)Date and time in UTC.
E2Include details of ATS unit such as service provided, radiotelephony frequency, SSR Codes assigned and altimeter setting. Use diagram to show the aircraft's position and attach additional papers as required.