Market Overview: Aircraft Auxiliary Power Unit Market Size is expected to reach USD 4.3 Billion by 2030, registering a CAGR of 3.20% during 2022-2030. In an aircraft, the APU can help as a back-up power generator under exceptionally rare circumstances where both engines fail. Aircraft APUs generally produce 115 V alternating current (AC) at 400 Hz for powering the electrical systems of the...