Vibration analysis is required for which of the following?

Vibration analysis is critical for ensuring the safety and operational efficiency of aircraft by identifying potential mechanical issues before they lead to failure. The correct choice emphasizes that all aircraft with technical manual requirements for troubleshooting must adhere to vibration analysis protocols. This is because technical manuals often include specific maintenance procedures, including vibration testing, as part of their preventive maintenance strategies.

By implementing vibration analysis as outlined in these manuals, maintenance personnel can detect imbalances, misalignments, or wear in rotating components, which is essential for maintaining airworthiness and prolonging the lifespan of the aircraft systems. This requirement applies across various aircraft types and does not restrict itself to specific categories like military or commercial, ensuring that even smaller or less frequently maintained aircraft receive appropriate attention to their vibration characteristics as per their technical documentation.