What happened
On 12 June 2014, a Piper PA-46, registered VH-TSV, departed Dubbo, New South Wales, destined for the Sunshine Coast, Queensland. The flight, carrying a pilot and one passenger, was intended to cruise at 13,500 ft AMSL. Approximately one hour into the flight, while positioned roughly 26 NM south of Narrabri, the pilot noticed a discrepancy in the manifold pressure gauge, which showed 25 inches Hg despite a throttle setting that typically produced 28 inches Hg.
In an attempt to resolve the issue, the pilot engaged the alternate air, but no power increase was observed. The pilot subsequently descended to 10,000 ft, where the pressure discrepancy persisted. While maneuvering toward Narrabri to avoid the Pilliga State Forest, the pilot noted a drop in oil pressure. As the aircraft descended through 6,500 ft, the oil pressure fell to zero, accompanied by two loud bangs and the momentary lifting of the engine cowling. The passenger noted smoke emerging from the engine and entering the cockpit.
Recognizing a partial engine failure, the pilot transitioned the aircraft into a glide at approximately 90 kt. After broadcasting a 'Mayday' call to Brisbane Centre, the pilot searched for a suitable landing site. Due to the presence of dense trees, no clear landing area was identified. The pilot extended the landing gear and flaps, shut off the fuel, and activated the emergency beacon. During the impact with the treetops, the pilot sustained serious injuries and lost consciousness. The aircraft slid approximately 10 meters after hitting the trees, resulting in substantial damage to the airframe.