Who issues a JAR 66 certifying staff license?

The JAR 66 certifying staff license is issued by the National Aviation Authority (NAA) of a country. Each member state of the European Union or the European Common Aviation Area has its own NAA responsible for the oversight of aviation regulations, including the certification of maintenance personnel. The NAA ensures that individuals meet the required standards and qualifications stipulated by aviation regulations, allowing them to hold the license.

This is important in ensuring safety and competency in aviation maintenance. The other entities mentioned, such as the head office of JAA or the local office of JAA, do not have the authority to issue licenses directly. Additionally, while an Approved Maintenance Organisation (AMO) can train individuals and even recommend them for certification, it is ultimately the NAA that performs the official licensing.