On 23 June 2006, an AMC Airlines MD83 significantly overran the landing runway at Juba after a late touchdown followed by unexpected and un-commanded asymmetry in ground spoiler deployment and thrust reverser control caused by an unappreciated loss at some point en-route of all fluid from one of the two hydraulic systems. The Investigation concluded that the abnormal hydraulic system status should have been detectable prior to attempting a landing but also that one of the consequences of hydraulic system design should be modified.