Errr and accomplished what with the regulator ??
A few examples;
The Phelan Papers included cases that helped change the regulatory framework. Things such as Part 47 registrations to make a definitive statement about who is responsible for aircraft maintenance. this took the duty of care owed by the LAME away from the bloke paying for a dodgy MR and put it straight onto the owner/ operator to make sure a MR reflected the product being sold or hired. Those cases also prompted a re-write of schedule 4 which had deficiencies that were exploited in the past. In concert with pilots with medical problems he used his vast glossary to bring case history to light where it could be used for a successful outcome. Diabetes is one that springs to mind.
There a many others to recount, but his best achievement is, and continues to be, to record every CASA abuse so others may not have to find out the hard way who they are dealing with.