Dominique F. Weinstein
This report presents the results of a comprehensive review of 600 cases over a period of 64 years during which pilots reported the presence of one or more aerial phenomena Unidentified (PAN) during their flight. In 443 cases (74%), the PAN has been described as "Objects" (circular in 42% of cases) rather than as light sources. In 162 cases (27%), visual observation is confirmed by radar detection (ground or embedded). This report specifically analyzes the 290 cases (48%) in which the PAN had (or could have) an impact on flight safety. In 108 cases (37%), the pilots felt that possibility of an impact on the safety of the flight was such that they have completed a report or Airprox of Airmiss. It was highlighted that the events with a potential impact on safety Air is the most reported: "The PAN approach on a collision course" (78 cases) and "PAN circled around and / or maneuver close to the plane" (59 cases). He also was found in 81 cases (14% of 600 cases), the pilots reported effects electromagnetic (EM) assumed, on one or more aircraft systems. And the radio systems compass systems are primarily affected. Private aircraft (passenger) are more affected assumed by EM effects come from PAN, probably due to the fact that their avionics and their compasses are less protected against interference / radio frequency and magnetic ionizing radiation than those of commercial and military aircraft. In four cases, Military aircraft weapons systems were rendered ineffective when they momentarily were directed to a PAN. Finally, in 31 cases, the pilot had to make a sudden maneuver avoidance to avoid a collision with a PAN, injuring passengers in five cases. These findings are potentially important and need to be confirmed by a study depth and the collection of other aeronautical high quality reports.
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