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Table 3:
Number of accidents experienced by AOC holders within each State
No. of States
No. of accidents involving AOC holders in each EASA MS
8 States
Licence AOC holders who were not involved in any accidents
9 States
Licence AOC holders who were collectively involved in 1 accident
6 States
Licence AOC holders who were collectively involved in 2 accidents
3 States
Licence AOC holders who were collectively involved in 3, 4, or 5 accidents
6 States
Licence AOC holders who were collectively involved in more than 5 accidents
The key points from the table are:
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Of the 32 EASA MS, there were 24 States where at least one AOC holder experienced an accident – this
equates to 74% of the EASA MS;
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The AOC holders of 6 EASA MS experienced more than 5 accidents. The actual number of accidents for
these states were 6, 8, 10, 14 or 21 accidents respectively. While these numbers of accidents appear
to be high, the States in question are those whose AOC holders fly the largest number of movements;
collectively over 1.5 Million movements. It highlights the importance of the later analysis in this chap‑
ter where the comparison with flight movements has been included.
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Nine States licence an AOC holder who has experienced 1 accident.
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Eight of the 32 States licence AOC holders that were not involved in any accidents over the period con‑
sidered; 2011 to 2014. Seven of those eight States regulate AOC holders who collectively conducted
the smallest number of movements; less than 88,000. The eighth State regulates AOC holders who be‑
tween them conducted 190,682 movements, being the twelfth smallest.
Accident rate per 10,000 movements
for each State
The accident rate per 10,000 movements for each EASA‑MS was calculated by taking the total number of acci‑
dents involving AOC holders licenced by each State, dividing it by the total number of movements conducted by
those AOC holders, and multiplying it by 10,000. Figure 2 summarises the States accident rate using a box plot.
Box plots are helpful because they help to summarise a number of statistics in one image. In this figure, it pro‑
vides information on the following: the average, the median, the lower quartile, the upper quartile, minimum
and the presence or absence of outliers. Each of these statistics is explained and provided in the text beneath
Figure 2.
The purpose of providing these statistics is to provide an understanding of the safety picture of both States and
AOC holders. It also enables States and AOC holders to compare their accident rates with the statistics provided
here. Information on how to do this is provided in the next subsection.