But the report did not address issues that have embroiled the supplier as the safety crisis over its airbags has grown: Takata's manipulation of testing data, its failure to alert regulators to problems and its disregard of outside studies warning of possible safety issues. These issues were outside the purview of the panel, the study's authors said. The report, commissioned by the supplier last year, also did not address whether ammonium nitrate is safe to use in airbags. "The panel did not attempt to assess past practices or evaluate Takata products in the automobile fleet. It did not attempt to evaluate the design of any Takata product," the report said. "The panel did not analyze any specific product failure or reported quality incident. The panel did not form any conclusions regarding the root cause of Takata's current inflater ruptures."