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| Date: | Saturday 20 January 2024 |
| Time: | morning |
| Type: |  Aquila A211 (AT01-100A) |
| Owner/operator: | Nedre Romerike Flyklubb |
| Registration: | LN-NRC |
| MSN: | AT01-100A-352 |
| Year of manufacture: | 2018 |
| Engine model: | Rotax 912 S3 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | near Lillestrøm, Akershus -
 Norway
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Kjeller Airport (ENKJ) |
| Investigating agency: | NSIA |
| Confidence Rating: |  Accident investigation report completed and information captured |
An engine failure shortly after takeoff from Kjeller Airport (ENKJ) forced the pilot to make an emergency landing in a field.
The pilot was slightly injured and the aicraft received minor damage.
All engine instruments showed normal values before departure from Kjeller Airport on runway 30. When the aircraft crossed the Nitelva River, the pilot noticed a reduction in power. Immediately afterwards, there was a "clank" and the propeller stopped. The pilot turned left and landed on a snow-covered field. The pilot recived minor injuries.
A review of the oil system revealed no signs of oil leakage and all the oil was found in the oil tank. No faults were found with the oil pump.
The meteorological station at Kjeller registered between -28 and -29 degrees Celsius during the period before the flight began. The investigation has revealed that the aircraft and engine documentation does not provide a clear picture of temperature limitations for the end user.
The NSIA believes that it is likely that a combination of cold temperatures and the choice of engine oil led to the oil system before the oil pump not being able to to deliver enough flow, causing cavitation in the oil pump. This reduced the oil pump's efficiency, which led to loss of lubrication and bearing failure. The NSIA believes that the design of the preheating system helped to mask the problem from the pilot, as a situation may have arisen where the engine received enough oil during ground operaiton but not at high power output during takeoff.
Accident investigation:
 |
|
Sources:
https://www.vg.no/nyheter/innenriks/i/ab644M/smaafly-noedlandet-paa-jorde-en-person-lettere-skadet
https://en.wikipedia.org/wiki/Kjeller_Airfield
https://cdn.jetphotos.com/full/6/17351_1631547225.jpg (photo)
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Jan-2024 13:47 | whiteshark | Added |
| 20-Jan-2024 13:48 | harro | Updated [Aircraft type, Registration, Cn, Other fatalities, ] |
| 20-Jan-2024 13:49 | harro | Updated [Aircraft type, Other fatalities, Destination airport, Narrative, ] |
| 20-Jan-2024 14:37 | Aerossurance | Updated [Location, Departure airport, Source, ] |
| 21-Jan-2024 13:10 | Anon. | Updated [Narrative, ] |
| 23-Jan-2024 06:56 | RobertMB | Updated [Aircraft type, Source, Damage, Narrative, ] |
| 23-Feb-2025 19:52 | ASN | Updated [Departure airport, Narrative, Accident report, ] |
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