Your unit will have copies of the form. Ensure you identify witnesses, if any, and ask them to provide statements. (That will save your Pl Comd from tracking them down based solely on the information you provide in the CF 98.) Be as detailed as possible in your statements, these forms are often the sole basis of supporting (or failing to support) claims for medical pensions a decade or two later, when it's impossible to add details.
Don't worry about the DND 663, your unit Safety Officer can fill that one out, thoigh you may be asked for details at some point. The DND 663 is a statistics gathering tool used by the CF to collect data on accidents to look for trends that may help to identify training requirements, equipment deficiencies, etc. They are important in their own right, but whether or not one is completed will not affect your file and the progress of the CF 98.
As my chief clerk reminds us on a far too constant basis, "when it comes to CF98, it's better slightly late than never." You don't want to end up incapable of working due to an injury 10 years down the road and not be able to be compensated for it because you didn't fill out that stupid little form.
I'm wondering if there is a way to verify the status on a CF 98, without the help of the chain of command?
Last year, I had to put two in for the same injury. They "lost" the first one...They made me do an another one. Never heard of it.
I got evasive answers that's all. I was expecting to get something in the mail, at least.