easyJet has announced the permanent rollout of Project APU-ZERO at its Milan Malpensa base following a successful trial aimed at reducing fuel consumption, carbon emissions and noise pollution. The initiative, first tested in September 2024, allows aircraft to switch off their auxiliary power units (APUs) during turnaround, replacing them with more sustainable ground-based alternatives.
The APU, a small gas turbine located at the tail of an aircraft, is essential for providing electric power and air conditioning while the plane is on the ground. It also plays a role in starting the engines before take-off. However, APUs consume a significant amount of fuel when the aircraft is stationary, contributing to noise and carbon emissions on the apron. To address this issue, easyJet partnered with TCR, PCA manufacturer Guinault, and ground-handling provider Menzies, with full cooperation from SEA Milan Airports, to introduce electric and hybrid pre-conditioned air units (PCAs).
These mobile ground support equipment units connect to the airport’s fixed electrical ground power (FEGP) at the gate, providing filtered and conditioned air to passengers and crew while eliminating the need for the APU. The transition not only reduces fuel consumption but also creates a cleaner and quieter airport environment for both staff and travellers.
During the trial, 57 easyJet aircraft operating in and out of Milan Malpensa’s Terminal 2 used the new system, leading to a notable reduction in fuel use and emissions. The airline estimates an annual fuel saving of 1,115 tonnes, equivalent to a reduction of 3,636 tonnes of CO₂.
Lahiru Ranasinghe, Director of Sustainability at easyJet stated that the airline takes a holistic approach to reducing its environmental impact both in the air and on the ground. He emphasised that the initiative delivers operational efficiencies, lowers emissions, and cuts noise without affecting performance. Following the success of the Milan Malpensa trial, easyJet aims to replicate this model across other bases in its network, further contributing to its decarbonisation efforts.
