Australia

The aircraft departed Cairns airport at 0707 Eastern Standard Time (EST) on a charter flight to Hicks Island. The aircraft was being operated under the Instrument Flight Rules (IFR) and the expected flight time was 2 hours. Shortly after takeoff the pilot requested an amended altitude of 4,000 ft. He indicated that he was able to continue flight with visual reference to the ground or water. Air Traffic Services (ATS) issued the amended altitude as requested. The IFR Lowest Safe Altitude for the initial route sector to be flown was 6,000 ft Above Mean Sea Level (AMSL). Data recorded by ATS indicated that approximately 13 minutes after departure, the aircraft disappeared from radar at a position 46NM north of Cairns. At the last known radar position the aircraft was cruising at a ground speed of 180 kts and at an altitude of 4,000 ft AMSL. An extensive search located the wreckage the following afternoon at a location consistent with the last known radar position, on the north-western side of Thornton Peak at an altitude of approximately 4,000 ft (1219 metres) AMSL. The aircraft was destroyed by impact forces and post-impact fire. The pilot and three passengers received fatal injuries. Thornton Peak is the third highest mountain in Queensland and is marked on topographic maps as 4,507 ft (1,374 metres) in elevation. Local residents reported that the mountain was covered by cloud and swept by strong winds for most of the year. The aircraft had been observed by witnesses approximately two minutes prior to impact cruising at high speed, on a constant north-westerly heading, in a wings level attitude and with flaps and landing gear retracted. They stated that the engines appeared to sound normal.

On 4 September 2000, a Beech Super King Air 200 aircraft, VH-SKC, departed Perth, Western Australia at 1009 UTC on a charter flight to Leonora with one pilot and seven passengers on board. Until 1032 the operation of the aircraft and the communications with the pilot appeared normal. However, shortly after the aircraft had climbed through its assigned altitude, the pilot’s speech became significantly impaired and he appeared unable to respond to ATS instructions. Open microphone transmissions over the next 8-minutes revealed the progressive deterioration of the pilot towards unconsciousness and the absence of any sounds of passenger activity in the aircraft. No human response of any kind was detected for the remainder of the flight. Five hours after taking off from Perth, the aircraft impacted the ground near Burketown, Queensland, and was destroyed. There were no survivors.

The pilot had submitted a flight plan nominating a charter category, single pilot, Instrument Flight Rules flight, from Darwin to Port Keats and return. The Piper Aerostar 600A aircraft, with 6 Passengers on board, departed Darwin at 2014 Central Standard Time and arrived at Port Keats at 2106 hours after an uneventful flight. The passengers disembarked at Port Keats and the pilot prepared to return to Darwin alone. At 2119 hours the pilot reported taxying for runway 34 to Brisbane Flight Service. That was the last radio contact with the aircraft. Witnesses noted nothing unusual as the aircraft taxied and then took off from runway 34. As a departure report was not received, a distress phase was declared and subsequently a search was instigated. The following morning a number of major structural components of the aircraft, including the outer left wing, were located at a position 24 km north-east of Port Keats aerodrome and close to the aircraft's flight planned track. The main portion of wreckage was found four days later, destroyed by ground impact. The impact crater was located a considerable distance from the previously located structural components and indicated that an inflight breakup had occurred. The accident was not survivable.

The Beechcraft Queen Air and Rockwell Aero Commander were being used by a company to conduct private category passenger-carrying flights to transport its workers from Leonora to Laverton in Western Australia. The Aero Commander had departed and was established in the Leonora circuit area when the Queen Air took off. The pilot and one of the passengers of the Queen Air reported the take-off roll appeared normal until the aircraft crossed the runway intersection, when they felt a bump in the aircraft. The pilot reported hearing a loud bang and noticed that the inboard cowl of the right engine had opened. He also reported that he believed he had insufficient runway remaining to stop safely, so he continued the takeoff. The cowl separated from the aircraft at the time, or just after the pilot rotated the aircraft to the take-off attitude. He reported that although the aircraft had left the ground after the rotation, it then would not climb. The aircraft remained at almost treetop level until the pilot and front-seat passenger noticed the side of a tailings dump immediately in front of the aircraft. The pilot said that he pulled the control column fully back. The aircraft hit the hillside parallel to the slope of the embankment, with little forward speed. The impact destroyed the aircraft. Although the occupants sustained serious injuries, they evacuated the aircraft without external assistance. There was no post-impact fire. The aircraft-mounted emergency locator transmitter (ELT) did not activate.

On the evening of 31 May 2000, Piper Chieftain, VH-MZK, was being operated by Whyalla Airlines as Flight WW904 on a regular public transport service from Adelaide to Whyalla, South Australia. One pilot and seven passengers were on board. The aircraft departed at 1823 central Standard Time (CST) and, after being radar vectored a short distance to the west of Adelaide for traffic separation purposes, the pilot was cleared to track direct to Whyalla at 6,000 ft. A significant proportion of the track from Adelaide to Whyalla passed over the waters of Gulf St Vincent and Spencer Gulf. The entire flight was conducted in darkness. The aircraft reached 6,000 ft and proceeded apparently normally at that altitude on the direct track to Whyalla. At 1856 CST, the pilot reported to Adelaide Flight Information Service (FIS) that the aircraft was 35 NM south-south-east of Whyalla, commencing descent from 6,000 ft. Five minutes later the pilot transmitted a MAYDAY report to FIS. He indicated that both engines of the aircraft had failed, that there were eight persons on board and that he was going to have to ditch the aircraft, but was trying to reach Whyalla. He requested that assistance be arranged and that his company be advised of the situation. About three minutes later, the pilot reported his position as about 15 NM off the coast from Whyalla. FIS advised the pilot to communicate through another aircraft that was in the area if he lost contact with FIS. The pilot’s acknowledgment was the last transmission heard from the aircraft. A few minutes later, the crew of another aircraft heard an emergency locater transmitter (ELT) signal for 10–20 seconds. Early the following morning, a search and rescue operation located two deceased persons and a small amount of wreckage in Spencer Gulf, near the last reported position of the aircraft. The aircraft, together with five deceased occupants, was located several days later on the sea–bed. One passenger remained missing.

Uzu Air conducted passenger and freight operations between Horn Island and the island communities in the Torres Strait. It operated single-engine Cessna models 206 and 208 aircraft, and twin-engine Britten Norman Islander aircraft. On the morning of the accident, the pilot flew a company Cessna 206 aircraft from Horn Island to Yam, Coconut, and Badu Islands, and then returned to Horn Island. The total flight time was about 93 minutes. The pilot's schedule during the afternoon was to fly from Horn Island to Coconut, Yam, York, and Coconut Islands and then back to Horn Island, departing at 1330 eastern standard time. The flight was to be conducted in Islander, VH-XFF. Three passengers and about 130 kg freight were to be carried on the Horn Island - Coconut Island sector. Another company pilot had completed three flights in XFF earlier in the day for a total of 1.9 hours. He reported that the aircraft operated normally. Witnesses at Horn Island reported that the preparation for the flight, and the subsequent departure of the aircraft at 1350, proceeded normally. The pilot of another company aircraft heard the pilot of XFF report 15 NM SW of Coconut Island at 3,500 ft. A few minutes later, the pilot reported downwind for runway 27 at Coconut Island. Both transmissions sounded normal. Three members of the Coconut Island community reported that, at about 1410, they were on the beach at the eastern extremity of the island, about 250 m from the runway threshold and close to the extended runway centreline. Their recollections of the progress of the aircraft in the Coconut Island circuit are as follows: the aircraft joined the downwind leg and flew a left circuit for runway 27; the aircraft appeared to fly a normal approach until it passed over their position at an altitude of 200-300 ft; and it then veered left and commenced a shallow climb before suddenly rolling right and descending steeply onto a tidal flat, about 30 m seaward from the high-water mark, and about 200 m from their position. A passenger was seriously injured while three other occupants were killed.

A Shrike Commander departed Horn Island on a charter flight to Saibai and Boigu Islands in accordance with the visual flight rules (VFR). The flight to Saibai took 32 minutes, and a further 13 minutes to Boigu Island. The aircraft then departed Boigu to return to Horn Island with an expected flight time of 35 minutes. The pilot reported that he had maintained 5,500 ft until commencing descent at 35 NM from Horn Island. He tracked to join final approach to runway 14 by 5 NM, reducing power at 1,500 ft. At 5 NM from the runway, the pilot extended the landing gear and approach flap and commenced a long final approach. When the aircraft was approximately 3 NM from the runway both engines commenced to surge, with the aircraft initially yawing to the right. The pilot commenced engine failure procedures and retracted the flaps. He tried a number of times to determine which engine was losing power by retarding the throttle for each engine, before deciding that the right engine was failing. The pilot shut down that engine and feathered the propeller. A short time later, when the aircraft was approximately 200 ft above the water, the left engine also lost power. The pilot established the aircraft in a glide, advised the passengers to prepare for a ditching, and transmitted a MAYDAY report on the flight service frequency before the aircraft contacted the sea. The aircraft quickly filled with water and settled on the seabed. All five occupants were able to escape and make their way ashore.

The aircraft operator had been contracted to provide a regular service transporting bank documents, medical pathology samples and items of general freight between Wagga Wagga, Albury and Corowa. On the day of the accident a passenger was accompanying the pilot for the day's flying. The pilot commenced the flight from Corowa to Albury under the Visual Flight Rules, flying approximately 500 ft above ground level. At Albury he obtained the latest aerodrome weather report for Wagga Wagga, which indicated that there was scattered cloud at 300 ft above ground level, broken cloud at 600 ft above ground level, visibility restricted to 2,000 m in light rain and a sea-level barometric pressure (QNH) of 1008 hPa. At 1715 Eastern Standard Time (EST) the aircraft departed Albury for Wagga Wagga under the Instrument Flight Rules. The pilot contacted the Melbourne en-route controller at 1728 and reported that he was maintaining 5,000 ft. Although the aircraft was operating outside controlled airspace, the en-route controller did have a radar surveillance capability and was providing the pilot with a flight information service. However, no return was recorded from the aircraft's transponder and at 1732 the pilot reported that he was transferring to the Wagga Wagga Mandatory Broadcast Zone frequency. This was the pilot's last contact with the controller. Although air traffic services do not monitor or record the Wagga Wagga Mandatory Broadcast Zone frequency, transmissions made on this frequency are recorded by AVDATA for the purpose of calculating aircraft landing charges. This information was reviewed following the accident. The pilot broadcast his position inbound to the aerodrome on the mandatory broadcast zone frequency and indicated that he was conducting a Global Positioning System (GPS) arrival. He established communication with the pilot of another inbound aircraft and at 9 NM from the aerodrome, broadcast his position as he descended through 2,900 ft. Approximately 1 minute and 20 seconds later, the pilot advised that he was passing 2,000 ft but immediately corrected this to state that he was maintaining 2,000 ft. He also stated that it was "getting pretty gloomy" and that according to the latest weather report he should be visual at the procedure's minimum descent altitude. The aircraft would have been approximately 6 NM from the aerodrome at this time. This was the last transmission heard from the pilot. The resident of a house to the south of Gregadoo Hill sighted the aircraft a short time before the accident. He was standing outside his house and stated that the aircraft was visible as it passed directly overhead at what appeared to be an unusually low height. The aircraft then disappeared into cloud that was obscuring Gregadoo Hill, approximately 350 m from where he was standing. Moments later he heard the sound of an impact followed almost immediately by a red flash of light. The noise from the engines appeared to be normal up until the sound of the impact. The aircraft had collided with steeply rising terrain on the southern face of Gregadoo Hill, approximately 40 ft below the crest. The hill is 4 NM from the aerodrome and is marked on instrument approach charts as a spot height elevation of 1,281 ft. The estimated time of the accident was 1739. The pilot and passenger sustained fatal injuries.

The aircraft was approaching to land after completing a handling display during an Open Day at RAAF Richmond. At an altitude of about 800 feet, on the base leg for runway 28, both engines stopped simultaneously and without warning. As there was insufficient altitude to reach the field for a power off landing, the flaps and landing gear were retracted and a successful forced landing carried out into a cleared field short of the airfield. The crew evacuated the aircraft without injury.

On the morning of the accident, the pilot and the loader-driver left Armidale in the aircraft between 0715 and 0730 and flew to the property "KOTUPNA". The task required the aircraft to operate from an agricultural strip 4,400 ft above mean sea level. Superphosphate spreading operations commenced between 0745 and 0800 and continued for approximately 1.5 hours after which the pilot and driver refuelled the aircraft and had a break. The pilot remarked to the driver that the aircraft was going very well and requested him to load a tonne of superphosphate. Operations resumed for about 1.5 hours and then ceased again whilst the aircraft was refuelled. After refuelling, the driver and the pilot had lunch and a break for about half an hour. The pilot again advised the loader driver that he would take a tonne, as the aircraft was performing well. After warming up the engine, the pilot made a normal take-off in a northeasterly direction and banked to the left to head southwest to the treatment area. The driver observed that the aircraft was lower and closer into the strip than had been the normal route to the treatment area. The aircraft did not seem to be climbing sufficiently to pass over the hill in front of it. The aircraft was then seen to be in a climbing left turn, toward the driver with superphosphate dumping from it. The aircraft's left wingtip contacted the ground after which the aircraft cartwheeled and came to rest 200-300 meters from the superphosphate dump. The driver ran down to the aircraft and found the pilot still strapped in the seat with no apparent sign of life. He moved the pilot clear of the aircraft in case of fire and then summoned help.