What is the time limit for the L Fuel Pressure before the standby pump must be overhauled?

The correct answer indicates that the time limit for the left fuel pressure before the standby pump must be overhauled is 10 hours. This specific limit is essential for maintaining the integrity and performance of the fuel system in the King Air 350.

Overhauling the standby pump after reaching this time threshold helps prevent potential malfunctions or failures, which could lead to serious safety issues during flight operations. Adhering to this maintenance schedule ensures that the standby pump operates effectively when required, thereby providing redundancy in the fuel system and contributing to overall flight safety.

The other time limits proposed in the choices represent intervals that are either longer or shorter than what is specified in the official maintenance guidelines. Using the correct time frame is crucial for maintaining optimal aircraft performance and safety.