Honeywell releases high-efficiency mode upgrade for 131-9A auxiliary power unit

©Honeywell APU

Honeywell has released a high-efficiency mode upgrade for its 131-9A auxiliary power unit for single-aisle Airbus aircraft. This high-efficiency mode, which is enabled by a software encryption key, is expected to increase the average time-on-wing by 1,200 flight hours and reduce fuel burn by 2%.

An auxiliary power unit (APU) is a critical piece of aircraft equipment that provides electrical power and air conditioning while the plane is on the ground to ensure increased passenger comfort, and supplies the air source when 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.

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