No fatalities

De Havilland Dragonfly II Emergency Landing in Swamp After Engine Failure (VH-ARI)

Wewak, Papua New GuineaTakeoff (climb)

On August 31, 1946, a De Havilland DH.84 Dragon (registration VH-ARI) operated by Mandated Airlines was involved in an aviation accident near Wewak, Papua New Guinea during takeoff. No fatalities were reported. Investigators recorded the probable cause as: The failure of the right engine was caused by the contamination of fuel by water. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-08-25Data APIEditorial standards

A twin-engine aircraft crashed into a swamp shortly after takeoff when the right engine failed due to water contamination, resulting in one injury.

What happened

The incident occurred immediately following departure while the aircraft was in the climb phase. The right engine experienced a sudden loss of power and subsequently failed. In response to the emergency, the pilot initiated a left turn to attempt an emergency landing on a nearby beach. However, the aircraft was unable to reach the intended area and instead impacted a coconut tree before coming to rest in a clearing within a swamp.

During the crash sequence, the starboard wing struck the palm tree, causing the airframe to slew around. The pilot sustained injuries, specifically a head wound and scalp laceration, while the five other occupants on board remained unhurt. Following the impact, the aircraft caught fire and was damaged beyond repair.

Findings

Investigation into the event revealed that the immediate cause of the engine failure was fuel system contamination. Although the pilot had drained both fuel tanks for water prior to takeoff, residual water remained in one tank. This water contamination led to the misfiring and subsequent power loss of the right engine shortly after liftoff.

Probable cause

The failure of the right engine was caused by the contamination of fuel by water.

Frequently asked questions

What happened in the 31 Aug 1946 De Havilland DH.84 Dragon accident near Wewak, Papua New Guinea?

A twin-engine aircraft crashed into a swamp shortly after takeoff when the right engine failed due to water contamination, resulting in one injury.

Were there any fatalities in the 31 Aug 1946 De Havilland DH.84 Dragon accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 31 Aug 1946 involved a De Havilland DH.84 Dragon, registration VH-ARI, operated by Mandated Airlines, at Wewak, Papua New Guinea.

What was the probable cause of the accident?

The failure of the right engine was caused by the contamination of fuel by water.