Sichuan Airlines has selected Honeywell's 131-9A auxiliary power units (APUs) for its A320 fleet of aircraft. As part of a five-year agreement, Honeywell will provide the 131-9A APU for Sichuan Airline's 93 new A320 aircraft that will enter service by 2025. The airline will also replace the APUs on its 141 existing A320 aircraft with the same Honeywell APU. This is the largest APU retrofit deal in Honeywell's history. The 131-9A APU will help Sichuan Airlines reduce flight delays and cancellations, creating a more pleasant flying experience for passengers. An APU is a critical piece of aircraft equipment that provides electrical power and air conditioning while the plane is on the ground. It helps ensure passenger comfort and supplies the air source before a pilot is ready to start the main engines. The 131-9A is known for its reliability and lower maintenance costs over the course of its entire life cycle, resulting in significant fuel savings each year. Honeywell's first APU took to the skies in 1950, and the company has built more than 100,000 since then. More than 36,000 APUs are in service across more than 150 regional, executive and commercial applications, including both fixed wing and rotary wing.