Complex sentence: The APU in use on the A380 is the PW 980A APU is the world's most powerful APU, providing 1,800 horsepower, which is 20 percent more powerful than the largest existing APU in service.
Split into simpler sentences: The APU in use on the A380 is the PW 980A APU. It is the world's most powerful APU, providing 1,800 horsepower, which is 20 percent more powerful than the largest existing APU in service.