Netherland Aerospace Centre (abbreviated NLR) last week supervised a number of brake tests on an Airbus A400 aircraft at Twente Airport. The tests, carried out at the request of Airbus, were performed in a water trough created by NLR on the runway. The quantity of water in the trough corresponded with the quantity that may occur on a runway during heavy rainfalls and that may potentially cause aquaplaning. Equipment on board the aircraft recorded the behaviour of the brakes. The purpose of the tests was to examine the aircraft’s braking performance under these extreme conditions and to improve it – if necessary – in order to avoid a runway overrun, a situation where an aircraft lands but is unable to stop before the end of the runway.