Yesterday I needed to replace the spring in my B&D Secure-A-Door. Strangely this product is no longer mentioned on the B&D Web Site (BND.COM.AU). First trick was removing the handle mechanism. There are actually three security torx screws hidden behind some black plastic plugs on the inside of the door. Removing them got half the job done. Then it was a simple matter of removing the handles. This is where things got hard.

I used (eventually) a mallet and big screwdriver to get the handle off. The currect solution is to find the small grub nut on the inside handle of the door. It is hidden but it is there. Once this is off, the faceplates come off. In my case a spring had died. A new spring was located in a $20 spring container at Jaycar. Putting it in solved the problem, and putting the door back together was fairly easy.