No fatalities

Engine Failure and Forced Landing After Takeoff (VH-ISI)

Wilton, AustraliaTakeoff (climb)

On November 25, 1984, a Britten-Norman Islander (registration VH-ISI) operated by Snowy Mountains Hydro-Electric Authority was involved in an aviation accident near Wilton, Australia during takeoff. No fatalities were reported. Investigators recorded the probable cause as: The engine failure was caused by jamming of accessory drive gearing as a result of the effects of excessive wear within a magneto. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-11Data APIEditorial standards

After takeoff at about 200 feet, the right engine lost power. The pilot attempted to return to the strip but struck the ground heavily in a paddock. Investigation found the failure was due to a worn magneto part and a missed mandatory inspection; the aircraft was also overweight.

Incident

At a height of approximately 200 feet after takeoff, the right engine lost power. The pilot feathered the propeller and initiated a gentle left turn with the intention of returning to the landing strip. He later reported that the aircraft began to sink towards some large trees, forcing him to increase the angle of bank to avoid them. Shortly thereafter, the aircraft struck the ground heavily in an adjacent paddock about 1 kilometer from the strip.

Investigation

The official investigation determined the probable cause of the engine failure. It was established that the failure resulted from jamming of the accessory drive gearing due to excessive wear within a magneto. The investigation noted that a mandatory inspection of the magneto, which had been due 84 flying hours before the accident, was likely not conducted.

Weight Considerations

At the time of takeoff, the aircraft's weight exceeded the authorized limit. Despite this, after the engine failure, the pilot was able to maintain straight and level flight. A cleared area of ground lay ahead and slightly to the left of the flight path, but the pilot believed the aircraft had sufficient performance to permit a return to the strip.