Which unit is the only auxiliary power unit (APU) to provide both electrical and pneumatic power?

The A/M 32A-60 is recognized as the only auxiliary power unit (APU) that provides both electrical and pneumatic power. This dual capability makes it especially valuable for maintaining the operational readiness of aircraft on the ground. It ensures that aircraft systems requiring electric power for starting engines, running avionics, or other systems can be effectively powered while simultaneously supplying pneumatic power for tasks like engine starting or cabin pressurization.

Understanding the functionalities of other systems clarifies why they do not match the A/M 32A-60. For instance, the A/M 32A-95 primarily focuses on supplying electrical power and may not provide the requisite pneumatic capabilities. The MA-1 serves mostly in the capacity of a starter cart, where it assists with engine starts but lacks the broader electrical support functionality of the A/M 32A-60. Similarly, the Starter Cart Assembly is typically limited to engine starting and does not offer the same comprehensive electrical and pneumatic support. Thus, the A/M 32A-60's capabilities stand out, justifying its designation as the only unit providing both types of power.