1978 Finnish Air Force DC-3 crash
Douglas C-47A · Engine failure, pilot error, stall
From Utti Air Base (UTI) to Helsinki Vantaa Airport (HEL)
Event
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- Event fatalities
- 15 · all aircraft and ground
- Ground fatalities
- Unknown
- Occupants
- Unknown
- Survivors
- 0
- InjuriesFatal: death within 30 days. Serious: over 48 hours in hospital within a week, most broken bones, severe bleeding, nerve or organ damage, or serious burns. Minor: anything less. Glossary
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- Military
Douglas C-47A
- Aircraft type
- Douglas C-47
- Category
- Airplane · from aircraft type
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- DO-10
- Operator
- Finnish Air Force
- Onboard fatalities
- 15
- Route
- From Utti Air Base (UTI)To Helsinki Vantaa Airport (HEL)
Cause areas
- Aircraft › Aircraft power plant
- Personnel issues › Task performance
From the investigation findings the Wikipedia article reports, sorted into the NTSB's cause areas with AI assistance.
Approximate · Coordinates from the Wikipedia article; not checked against an investigation report.
From the Wikipedia article
The Finnish Air Force DC-3 disaster occurred when a plane of this class crashed into Lake Juurusvesi in Rissala on 3 October 1978, killing all fifteen people on board. It was caused by a cracked exhaust valve, resulting from metal fatigue in an engine cylinder. Most of the victims were politicians and prominent businessmen attending a National Defence Course meeting organized by the Finnish Defence Forces.
The accident has been the third worst aviation accident in Finland, and the worst involving a Finnish Air Force aircraft.
Incident
After the airplane departed Kuopio Airport at 21:31 local time, one of its engines lost power. The pilot attempted to return to the airport, but during the turn, the aircraft lost altitude and impacted Lake Juurusvesi. This happened only seconds after the pilot, Kari Halmetoja, had informed the flight control about the problem. The weather was very windy at the time.
Investigation and cause
Investigation
The primary cause of the accident was found to be mechanical failure resulting from a fatigue breakdown in one of the cylinders of the right-side engine, which resulted in cracking of an exhaust valve. The airplane had been maintained and was checked the previous day, but the crack would only have been visible by partially disassembling the engine.
There was no flight recorder on board so no technical investigation of the pilots' actions could be made, but the official investigation determined that the pilot had likely turned too steeply because it should be possible to bring a plane of this type back with just one engine. The investigation board also speculated that the attention of the crew was concentrated on the engine failure instead of flying with one engine, possibly due to carrying out engine fire drills.
Text from the Wikipedia article “1978 Finnish Air Force DC-3 crash” (revision 1372143363, retrieved 2026-09-18) by its authors, under CC BY-SA 4.0. Extracted as plain text: references, tables, images and some sections are left out. Read the article
Sources
Wikipedia article: 1978 Finnish Air Force DC-3 crash
- Revision
- 1372143363 · 2026-08-30 · retrieved 2026-09-18
- Wikidata
- Q11890853
- Licence
- Text CC BY-SA 4.0, by the article's authors; Wikidata CC0; town positions GeoNames (CC BY 4.0)
Where each value comes from
- Record
- Wikipedia article "1978 Finnish Air Force DC-3 crash" (page 44081838, revision 1372143363)
- Date
- Wikipedia infobox: date
- Place and country
- Wikipedia infobox: site
- Map position
- Wikipedia article coordinates
- Aircraft, operator and route
- Wikipedia infobox: aircraft type, registration, operator, origin and destination; route airports from the linked airport articles' Wikidata codes (OurAirports)
- Operation
- operator named as an armed force or military unit in the infobox
- Fatalities
- Wikipedia infobox: aircraft fatalities
- Ground fatalities
- not stated in the Wikipedia infobox
- Summary
- Wikipedia infobox: summary
Source notes (1)
- Wikipedia · Facts from the Wikipedia article's infobox and coordinates, not checked against an investigation report. Independent review pending.