The pilot had landed at the one-way agricultural strip in order to deliver covers for a load of superphosphate. The subsequent take-off was normal until the point where the tail of the aircraft was raised. At this time the aircraft was affected by a strong wind gust, and the pilot was unable to maintain directional control. The aircraft ran off the side of the strip and struck scrub and a steel fence post. The wind at the time was relatively strong, giving a substantial downwind/crosswind component. Although the pilot had operated from this strip on numerous occasions, he had not worked from it for about 12 months. The strip posed difficulties because it changed direction to the right over the crest of a hill. Due to a strong left tailwind, the pilot had to maximise the take-off run available. The path chosen, combined with the prevailing wind, took the aircraft off the right side of the strip before it had attained flying speed.

The pilot was carrying out his first cross country flight over unfamiliar terrain. After passing over one of his planned turning points he became concerned about the aircraft's location and decided to follow a road back towards the destination. Enroute the pilot descended the aircraft to read a road sign in an endeavour to establish his location. However, the aircraft struck a power line and subsequently collided with the ground. This accident was not the subject of an on-site investigation.

The pilot had been engaged in fertiliser spreading operations on the property since the previous day. During a meal break between sorties, the pilot and his father discussed the presence of a powerline which crossed a creek on the property. Immediately following the break, the pilot continued with the spreading operation, before turning and following the line of the creek. It was considered that he was proceeding towards an area which required clean-up runs to complete the treatment. The right wing of the aircraft struck and became entangled in the single wire powerline, and the aircraft crashed into the creek bed. A fire broke out on impact and consumed the wreckage. The powerline was suspended from poles on either side of the creek, with a span between poles of 735 metres. The aircraft struck the wire approximately 50 metres above ground level. The weather conditions at the time were fine and cloudless, with no restrictions to visibility. The investigation did not reveal any fault or malfunction with the aircraft which might have contributed to the accident. It is likely that the pilot forgot the presence of the wire, and either did not see it, or saw it too late to take avoiding action. The wire itself was hard to see against the background, and the wide span between supporting poles made the task of detection more difficult. The reason the pilot apparently forgot the presence of the powerline, so soon after specifically discussing it, could not be determined.

The aircraft arrived at the destination strip about 40 minutes after last light. Weather conditions in the area were good, with light winds and clear skies, however the night was very dark and there was no visible horizon. Witnesses on the ground reported that the aircraft seemed to be at a normal height on the crosswind leg and as it turned onto downwind. However, it was then seen to enter a gradual but steady descent. About half way along the downwind leg, the lights of the aircraft were lost to sight. The aircraft impacted the ground in a straight and level attitude, bounced 118 metres, and then bounced and skidded for a further 216 metres before coming to rest. No fault was subsequently found with the aircraft which might have contributed to the development of the accident. The pilot lacked recent experience in night operations. He had made only two night flights in the previous 32 months, the most recent being some 11 months prior to the accident. On the downwind leg of the circuit, the pilot had apparently not increased engine power after the gear was lowered. He had also been concentrating on his position relative to the flare path, and had evidently paid insufficient attention to the height of the aircraft.

The pilot left his home base and flew to the strip from which he intended to conduct top dressing operations. Shortly after a normal take-off with the first load of superphosphate, the engine power suddenly deteriorated rapidly. The pilot dumped the load and landed in an adjoining paddock, but the aircraft collided with a fence and subsequently ground looped. No fault was subsequently found with the engine, which was still operating at idle power when the aircraft came to rest. After arrival at the agricultural strip, the pilot had left the engine idling for several minutes with the carburettor heat selected to the cold position. Atmospheric conditions were suitable for the formation of carburettor icing, and it was most probable that this had occurred. The pilot had been in the habit of using reduced power for take-off, which may have aggravated any tendency for carburettor ice to form.

The pilot was carrying out a survey of various properties he intended to spray in the near future. While climbing to return to Lismore after surveying the last property, the engine suddenly ran roughly and then stopped. The pilot was committed to a forced landing on unsuitable terrain, and the aircraft collided with a windrow of fallen trees 146 metres after touchdown. A fire then broke out and engulfed the wreckage. The subsequent investigation revealed that there had been no failure of the internal components of the engine, however the fire had destroyed many of the accessories, including the carburettor and parts of the fuel system. The fuel filter outlet elbow was not an aircraft standard part, and there was inadequate sealing between this elbow and the fuel outlet hose. However, whether this had any bearing on the development of the accident could not be established, and the cause of the engine failure remains undetermined.

The pilot was participating in a "ridge soaring camp". After becoming airborne the glider was flown at low level in a south-westerly direction along the ridge line, about 200 feet above the ridge. The pilot then turned the aircraft left towards the ridge in an attempt to gain lift. No lift was gained and the aircraft descended. The pilot then raised the nose of the aircraft to clear the ridge but the right wing struck a tree. The aircraft slewed to the right and descended down the ridge line before impacting the ground. The pilot had intended to turn back towards the ridge but delayed this turn to allow her passenger to take a photograph. The resultant flight path took the aircraft into an area of sink on the leeward side of the ridge. The pilot usually flew the glider from the front cockpit but due to centre of gravity considerations she had to use the rear cockpit which somewhat restricted her forward vision. The volume of the variometer, which was fitted in the front cockpit, was turned down so as not to disturb the passenger, however this action also deprived the pilot of immediate indication of changes in lift. This accident was not the subject of an on-site investigation.

The pilot was engaged in the spraying of a crop of beans and had successfully completed several spray runs. At the commencement of the next spray run the aircraft flew into powerlines which struck the main landing gear. The aircraft subsequently struck the ground in a steep nose-down attitude, then nosed over and came to rest inverted some 73 metres beyond the point of collision with the wires. The pilot's memory was affected by trauma suffered in the accident and he could not remember details of the wire strike. Consequently, a reason for the wire strike was not established. However, it was noted that the powerlines were oxidised and that the span between the poles was quite long. Both of these factors could have adversely affected the pilot's ability to see the wires against the natural background.

The student was being instructed in crosswind techniques, and several circuits and landings had been completed without incident. On the final circuit a normal approach and touchdown were made, but during the landing roll the right wing lowered and the aircraft swung through 90 degrees. Initial inspection found that the lower torque link bolt on the right gear had failed, allowing the wheel assembly to detach. Engineering investigation revealed that the torque link bolt was of defective manufacture in that stress raisers existed near the thread root. This condition resulted in a slow progressive fatigue fracture originating from the stress raisers. There is no inspection requirement for this bolt and the defect is considered an isolated case.

The pilot had borrowed the aircraft from his brother to carry out some taxi training. He had previously flown gliders. After making about 20 runs along the strip the aircraft became airborne, the pilot decided to continue with the takeoff as he was uncertain if the aircraft could be stopped in the remaining available strip. The aircraft collided with trees at the end of the strip and became wedged in the tree tops. The pilot escaped from the aircraft uninjured and had to climb down the tree to the ground. This accident was not the subject of an on-site investigation.