Bob Upandown
The end date on the SID's is just that, but the checks are divided into calendar and flying hour requirements, some due each annual check and others only at hourly intervals.
If you reach 10,000 hours or twenty years all of them are due now, if your aircraft is younger or has very few hours only a few of the checks may me due.
Those who are reading the end date as the time these checks are due are likely to get a big shock if the EASA inspectors get a look at the engineering records, releasing aircraft without doing these checks could well cost the engineer his licence or the CAMO their approval.