After many years of ARB, CAA and JAA I am now having to get to grips with EASA
What an absolute pigs ear.
They are trying to re-invent the wheel and charging users a fortune to do it.
STC that are purchased from the US now have to be approved by EASA.
I have had a couple go through the process and they have to be reviwed by an EASA design Organisation $*****
Then they are submitted to EASA
Two fees from EASA- one to submit $**** and one to issue the approval $ ***
Even with NO technical changes this is the cost to the operator.
Incidental there is no fixed fee for this. You do not get the fibnal amount until the approval is ready
EASA has designated Centres of Excellence with a lead authority.
SO

Take L1011. they have been certificated and operated in several EU countries, UK, Germany, Portugal, Sweden
The lead country for L1011 is
Netherlands
Is that an oxymoron or what