No. After an aircraft crash, federal authorities often investigate to determine the probable cause. That investigation is important, but it is separate from your right to compensation — it does not decide your claim, and its findings are used in only a limited way in an injury case.
Your claim is built on its own investigation and evidence: the maintenance and flight records, the physical evidence, weather and communications, and the analysis of aviation experts. A federal probable-cause finding may inform the picture, but establishing liability for your claim is a separate effort, and one that often goes further than the official inquiry.
This is one reason acting early matters. Waiting for the official process to conclude can mean critical records and physical evidence — often controlled by others — are lost. Preserving them quickly protects your ability to build the case.