Final answer:
Certificated aircraft mechanics with proper A&P certification are generally allowed to perform minor repairs on aircraft instruments. However, specialized certifications like the IA or a repairman certificate for instruments may be needed for more complex tasks. Mechanics must comply with FAA regulations and document all repairs properly.
Step-by-step explanation:
Whether a certificated aircraft mechanic can make a minor repair to an aircraft instrument depends on the regulations set forth by the Federal Aviation Administration (FAA) and the mechanic's certifications. In general, certificated aircraft mechanics with an Airframe and Powerplant (A&P) certification can perform minor repairs on aircraft, including certain instrument repairs. However, for more specialized instruments, an additional certification known as the Inspection Authorization (IA) or repairman certificate for instruments may be required. Each repair must also be performed in accordance with the manufacturer's instructions and FAA regulations.
It is also important to adhere to the guidelines detailed in the aircraft's maintenance manual and the FAA's Advisory Circulars. Proper documentation of all repairs is essential to ensure the aircraft remains airworthy and in compliance with regulations. As such, it is the responsibility of the certificated aircraft mechanic to be aware of and adhere to all regulatory requirements and limitations of their certification.