Yes, it's possible.
The AAIB provides copies of draft reports to all interested parties (including the next of kin) to allow them an opportunity to make any comments/suggestions on the draft findings and recommendations before the final report is published. ('Interested' in this context means people or bodies directly concerned in or with the findings/recommendations, not just curious.)
The AAIB takes submissions into account, but doesn't necessarily accept them.
Tudor Owen