On 11 May 2015, a Boeing 737-800 crew making a night landing at Christchurch had to react quickly when braking action deteriorated and only just succeeded in preventing an overrun. The Investigation found that a damp rather than wet runway had been assumed despite recent rain and that the aircraft operator had recently changed their procedures so that a damp runway should be considered as dry rather than wet for runway performance purposes. The questionable determination of the crew that the runway was likely to be damp, not wet, was attributed to a relatively high workload prior to final approach.