What is the cautionary limit for Fuel Pressure?

• A. 0-5 psi
• B. 0-7 psi
• C. 7-10 psi
• D. 10-15 psi

Answer: (B)

The cautionary limit for fuel pressure in the TH-73A is indeed set between 0 and 7 psi. This range indicates the levels at which operators should be vigilant regarding the fuel system's performance. Operating within this limit ensures that the fuel system is functioning properly without causing any potential engine performance issues. If fuel pressure drops below this range, it may result in inadequate fuel delivery to the engine, which could lead to engine roughness, power loss, or even engine failure. Therefore, maintaining fuel pressure above 0 psi while monitoring it to ensure it does not exceed 7 psi is crucial for safe operation.

Understanding these limits is vital for ensuring the safety of flight operations and preventing any malfunction that could arise from improper fuel pressure readings.