What is the primary function of the Power Management Unit (PMU)?

The primary function of the Power Management Unit (PMU) in the T-6B is to keep the engine and propeller within safe operating limits. This critical role includes monitoring various engine parameters and managing the fuel flow to ensure optimal performance. By regulating the power output and preventing conditions that could lead to engine or propeller damage, the PMU contributes significantly to the safety and efficiency of the aircraft during flight operations.

Other options, while relating to aircraft systems, do not accurately represent the primary role of the PMU. Processing data for the Engine Indicating and Crew Alerting System (EICAS) and displaying oil pressure are functions managed by different systems within the aircraft. Recording flight data is also an important task, but it falls under the purview of flight data recorders or avionics rather than the PMU itself. Therefore, focusing on the PMU's responsibility for engine and propeller management is essential in recognizing its integral part in flight safety and performance.