Which computer monitors the bleed-air leak detection system?

The monitor responsible for the bleed-air leak detection system is the Integrated Airborne System Controller (IASC). This system is designed to oversee various functions within an aircraft, including the detection and management of bleed-air leaks. The IASC plays a critical role in ensuring the safety and efficiency of the aircraft by continuously monitoring parameters and providing real-time feedback regarding the health of the aircraft's air systems.

The other options, while relevant to aircraft systems, do not handle bleed-air leak detection specifically. The FADEC (Full Authority Digital Engine Control) primarily manages engine performance and controls, while the ISCI (Integrated Supervisory Control Interface) is focused on systems management and supervision. The APU ECU (Auxiliary Power Unit Electronic Control Unit) controls the auxiliary power unit but does not interface directly with bleed-air leak detection. Understanding the specialized role of each system helps clarify why the IASC is the correct choice for this function.