The Joint Aviation Authorities (JAA) was an associated body of the ECAC representing the civil aviation regulatory authorities of a number of European States who had agreed to co-operate in developing and implementing common safety regulatory standards and procedures. It was not a regulatory body, regulation being achieved through the member authorities.
The JAA wanted safer aviation.
According to the context, The JAA represented European nations and through there cooperation, they developed and implemented safety regulatory standards and procedures. Implying that they wanted safer aviation.