There seems to be a mistake in the default types and events xml supplied with the DayZ Server files.
In types.xml:
<type name="SantasSleigh">
<nominal>0</nominal>
<lifetime>3</lifetime>
<restock>0</restock>
<min>0</min>
<quantmin>-1</quantmin>
<quantmax>-1</quantmax>
<cost>100</cost>
<flags count_in_cargo="0" count_in_hoarder="0" count_in_map="1" count_in_player="0" crafted="0" deloot="0"/>
</type>should be:
<type name="Wreck_SantasSleigh">
<nominal>0</nominal>
<lifetime>3</lifetime>
<restock>0</restock>
<min>0</min>
<quantmin>-1</quantmin>
<quantmax>-1</quantmax>
<cost>100</cost>
<flags count_in_cargo="0" count_in_hoarder="0" count_in_map="1" count_in_player="0" crafted="0" deloot="0"/>
</type>and the events.xml entry should reflect that in the children from:
<event name="StaticSantaCrash">
<nominal>3</nominal>
<min>0</min>
<max>0</max>
<lifetime>2100</lifetime>
<restock>0</restock>
<saferadius>1</saferadius>
<distanceradius>1</distanceradius>
<cleanupradius>1000</cleanupradius>
<secondary>InfectedSanta</secondary>
<flags deletable="1" init_random="0" remove_damaged="0"/>
<position>fixed</position>
<limit>child</limit>
<active>1</active>
<children>
<child lootmax="15" lootmin="10" max="3" min="1" type="SantasSleigh"/>
</children>
</event>to
<event name="StaticSantaCrash">
<nominal>3</nominal>
<min>0</min>
<max>0</max>
<lifetime>2100</lifetime>
<restock>0</restock>
<saferadius>1</saferadius>
<distanceradius>1</distanceradius>
<cleanupradius>1000</cleanupradius>
<secondary>InfectedSanta</secondary>
<flags deletable="1" init_random="0" remove_damaged="0"/>
<position>fixed</position>
<limit>child</limit>
<active>1</active>
<children>
<child lootmax="15" lootmin="10" max="3" min="1" type="Wreck_SantasSleigh"/>
</children>
</event>