What happens if both inverters fail in the TH-73A?

• A. The helicopter will continue to operate normally
• B. A backup system will automatically engage
• C. The primary systems will lose power
• D. Communications will be lost

Answer: (C)

If both inverters fail in the TH-73A, the primary systems will lose power. This is because the inverters are responsible for providing electrical power to essential systems within the helicopter. In the absence of functioning inverters, there would be insufficient power supply to operate the avionics, flight instruments, and other critical systems that rely on this electrical power. Consequently, the failure of both inverters results in a loss of power to these primary systems, potentially impacting the helicopter's operation and safety.

It’s important to understand that the TH-73A is designed with systems that depend heavily on reliable power sources; thus, the functioning of inverters is crucial for maintaining overall operational integrity. The other choices—continuing operation without issues, a backup system automatically engaging, or loss of communications—do not accurately represent the consequences of a complete inverter failure, as primary systems losing power would be the more immediate and critical result.