The microlight aircraft departed Lough Conn airfield, Co. Mayo at 16.33 hrs for a local flight towards Tobercurry, Co. Sligo. When the aircraft was returning, and was approximately 4.5 NM from Lough Conn airfield, it was observed entering a left-hand descending turn. The aircraft impacted terrain, in a near vertical, nose-down attitude. The aircraft was destroyed, and the Pilot, who was the sole occupant, was fatally injured. There was no fire.