PACT CENTRES
My understanding is that the PACT Centres offered six month courses to those failing their education test at ACRC. Unfortunately, I have not been able to find the course syllabus.
APTITUDE TESTS
I found an interesting article about the development of the aircrew aptitude test whilst researching the subject a few months ago. For those interested, the link is:
http://ftp.rta.nato.int/public//PubFulltext/RTO/MP/RTO-MP-055///MP-055-25.pdf