Probably related to Electric Ground Taxi System [0] which allows the APU(Auxiliary Power Unit, a small turbine driven generator) or potentially batteries to pro

Probably related to Electric Ground Taxi System [0] which allows the APU(Auxiliary Power Unit, a small turbine driven generator) or potentially batteries to provide electrical power for taxiing. The APU also powers the air conditioning packs on the ground. The electric taxiing system was tested on Easyjet [1] [0] https://en.wikipedia.org/wiki/EGTS https://en.wikipedia.org/wiki/EGTS [1] http://aviationweek.com/commercialregiontabs-true/easyjet-test-honeywellsafran-electric-taxi-system http://aviationweek.com/commercialregiontabs-true/easyjet-te...