Handle is broken and am waiting for a new one. In the meantime I am unable to find any diagram on how to replace it. After paying over $100. for just the handle I am reluctant to call a appliance repair. The handle Number is #5304440323 (58). The thing is just like new 2 years old.
You can find some useful information, instructions and video in one of our previous posts: http://forum.appliancepartspros.com/microwave-repair/255-microwave-handle.html
Here are the breakdown diagrams and Replacement parts for FRG FMV156DCC | AppliancePartsPros.com
Gene.