Which of the following systems does a Mechanical Aircrewman not monitor?

A Mechanical Aircrewman primarily focuses on the various mechanical systems that ensure the aircraft operates safely and efficiently. This includes engine systems, hydraulic systems, and fuel systems, which are all critical to the performance and control of the aircraft.

Engine systems monitoring involves overseeing the engine operation to ensure performance parameters are met. Hydraulic systems are responsible for the operation of flight controls and landing gear, thus requiring constant vigilance. Monitoring fuel systems ensures that adequate fuel supply and distribution are maintained for optimal operation.

In contrast, avionics systems pertain to the electronic systems used for communication, navigation, and other electronic functions within the aircraft. These systems are generally managed by an Avionics Technician or specialist, rather than a Mechanical Aircrewman. Thus, the correct response is that a Mechanical Aircrewman does not monitor avionics systems, as that role falls outside their primary area of responsibility.