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Engine Power Loss and Stall Shortly After Takeoff from Olenek Airport (CCCP-70805)

Olenyok, RussiaTakeoff (climb)

On October 13, 1979, a PZL-Mielec AN-2 (registration CCCP-70805) operated by Aeroflot - Russian International Airlines was involved in an aviation accident near Olenyok, Russia during takeoff. No fatalities were reported. Investigators recorded the probable cause as: The loss of engine power was the consequence of the malfunction of the spark plugs due to an excessive accumulation of tetraethyl plumb. 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 2026-07-04Data APIEditorial standards

Shortly after takeoff from Olenek Airport, an aircraft experienced an engine power loss at 100-120 meters. The captain attempted to return for an emergency landing but the airplane stalled and crashed. All five occupants were injured.

Incident Overview

At 1651 local time, an aircraft departed from Olenek Airport. During the initial climb, as it reached an altitude of 100 to 120 meters, the engine lost power. The captain decided to execute a return for an emergency landing and initiated a left turn. Shortly thereafter, the airplane stalled and impacted the ground, occurring approximately one minute after takeoff.

Damage and Injuries

The aircraft was destroyed in the accident. All five persons on board sustained injuries.

Investigation Findings

The investigation determined that the loss of engine power resulted from spark plug malfunction. This malfunction was attributed to an excessive accumulation of tetraethyl lead on the spark plugs.

Probable cause

The loss of engine power was the consequence of the malfunction of the spark plugs due to an excessive accumulation of tetraethyl plumb.
Engine failure

Related events

Same operator

Frequently asked questions

What happened in the 13 Oct 1979 PZL-Mielec AN-2 accident near Olenyok, Russia?

Shortly after takeoff from Olenek Airport, an aircraft experienced an engine power loss at 100-120 meters. The captain attempted to return for an emergency landing but the airplane stalled and crashed. All five occupants were injured.

Were there any fatalities in the 13 Oct 1979 PZL-Mielec AN-2 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 13 Oct 1979 involved a PZL-Mielec AN-2, registration CCCP-70805, operated by Aeroflot - Russian International Airlines, at Olenyok, Russia.

What was the probable cause of the accident?

The loss of engine power was the consequence of the malfunction of the spark plugs due to an excessive accumulation of tetraethyl plumb.

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