On 20 September 1976, three airmen Tom Gannon, Jimmy Byrne and Dick O'Reilly from nearby Abbeyshrule, were killed when their plane crashed not far from O'Loughlin's Castle, a rock-formation near Greenane West, on the Galtys. The three were founding members of Abbyshrule Air Club. A stone monument in the shape of a plane's tailfin was erected () a short distance into the Black Road Route on the path to Knockeenatoung. The crash led to the founding of the South Eastern Mountain Rescue Association (SEMRA) in 1977. The event was remembered on its 40th anniversary by SEMRA in September 2016.