On November 21, 1985, a Lockheed C-130 Hercules (registration A-1322) operated by Indonesian Air Force - TNI-AU Tentara Nasional Indonesia - Angkatan Udara was involved in an aviation accident near Mt Sibayak, Indonesia during landing or approach. 10 people were killed. Investigators recorded the probable cause as: The aircraft struck a mountainside during descent while flying in poor weather conditions. 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.
A four-engine aircraft crashed into a mountainside while approaching Medan-Polonia airport under adverse weather conditions, resulting in no survivors.
What happened
During an approach to Medan-Polonia airport, a four-engine aircraft encountered difficult meteorological conditions. While the flight was in its descent phase, the aircraft made contact with the terrain on the slope of Mount Sibayak. The impact with the mountainside caused the total destruction of the airframe.
There were no survivors of the accident. All 10 occupants on board the aircraft perished during the collision.
Findings
The flight was operating in poor weather conditions at the time of the accident.
The aircraft struck the slope of Mount Sibayak while descending toward its destination.
Probable cause
The aircraft struck a mountainside during descent while flying in poor weather conditions.
What happened in the 21 Nov 1985 Lockheed C-130 Hercules accident near Mt Sibayak, Indonesia?
A four-engine aircraft crashed into a mountainside while approaching Medan-Polonia airport under adverse weather conditions, resulting in no survivors.
Were there any fatalities in the 21 Nov 1985 Lockheed C-130 Hercules accident?
The accident was fatal, resulting in 10 fatalities.
What aircraft was involved and where did it happen?
The accident on 21 Nov 1985 involved a Lockheed C-130 Hercules, registration A-1322, operated by Indonesian Air Force - TNI-AU Tentara Nasional Indonesia - Angkatan Udara, at Mt Sibayak, Indonesia.
What was the probable cause of the accident?
The aircraft struck a mountainside during descent while flying in poor weather conditions.
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