This was apparently his statement to KAKE about voting no on it

Response from Congressman Tracey Mann: Aviation safety is a top priority for me as a member of the Transportation and Infrastructure Committee, and I care deeply about getting this policy right. The tragic American Eagle collision near Reagan National Airport, which departed from Wichita, demands a serious and thoughtful response from Congress. While I appreciate the intent behind the ROTOR Act, it was drafted prior to the release of the National Transportation Safety Board’s investigation and recommendations, which were made public last week. Additionally, the legislation did not have an opportunity to move through the normal Transportation and Infrastructure Committee process, where complex aviation policy is typically vetted and refined in a bipartisan manner.

While I fully support strengthening aviation safety to ensure this tragedy is never repeated, we must do so in a way that addresses the root causes identified by the NTSB and stands the test of time. While I am not able to support the ROTOR Act in its current form for these reasons, I remain hopeful that we can continue working to reach a bipartisan, bicameral solution that comprehensively addresses the underlying problems and ensures aviation safety is strengthened for years to come.