Who is authorized to apply the range marking to an instrument dial face?

The authority to apply the range marking to an instrument dial face is granted specifically to a certificated instrument repair station. This is because the repair station has the required expertise, equipment, and certifications to ensure that the instrument is marked correctly and in accordance with regulatory standards. The marking process must be precise, as it provides critical information regarding the operational limits of the instrument, which is essential for safe aircraft operation.

Applying range markings improperly could lead to misinterpretation of the instrument readings, potentially compromising flight safety. A certificated instrument repair station is equipped to follow the proper procedures in accordance with FAA regulations, ensuring that any markings on the dial face are compliant and accurate. This emphasizes the importance of specialized knowledge and adherence to safety standards when it comes to aircraft instruments.