A. JAA regulations state only one pilot can log PIC of a single pilot aircraft. (The Duchess is a single pilot aircraft.) If you are flying with another pilot or flight instructor, they may not log flight time. Students that have been applying for JAA licensing in Europe have seen an increased rejection rate for incorrectly logged hours.
# Aviator Flight Training Academy, in conjunction with European Flight Training, will certify your logbook and verify your hours are logged in accordance with JAA regulations
That's from Aviators website.
APPP's website only shows pics of two pilots in the airplane.
Which means that under JAA you cannot log all that time.
The scary things is that they encourage ridiculous amounts of flying time in a day. Whoever encourages 17 hrs of flying in a 24 hr period needs to have their head examined.