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| Date: | Wednesday 25 July 1990 |
| Time: | c. 08:30 |
| Type: |  Aero Commander 680E |
| Owner/operator: | Värmlandsflyg AB |
| Registration: | SE-FTP |
| MSN: | 680-E-623-1 |
| Total airframe hrs: | 8346 hours |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Hassela, Sundsvall -
 Sweden
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | |
| Investigating agency: | SHK |
| Confidence Rating: |  Information verified through data from accident investigation authorities |
Lost right wing. The investigation by the Swedish Board of Investigation concluded that a fatigue crack started and propagated to failure in the main spar lower cap at WS 98, inside the engine nacelle. The aeroplane had flown 8346 hours. The Board noted the following contributors to the cracking: severe low-level, terrain-following flying; a geometric discontinuity in the spar cap; a 0.15 mm deep corrosion pit; and fretting of the engine firewall on the spar.
Accident investigation:
 |
|
Sources:
transportstyrelsen.se,
http://www.iagsa.ca/1990/08/aero-commander-680-sweden-wing-failure/
https://www.havkom.se/assets/reports/C-1991_25-SE-FTP.pdf
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 20-Mar-2011 03:54 | Masen63 | Updated [Cn, Operator, Location, Phase, Nature, Source, Damage, Narrative, ] |
| 07-Aug-2023 16:27 | sparrow9 | Updated |
| 05-Nov-2023 10:46 | harro | Updated [Accident report, ] |
Corrections or additions? ... Edit this accident description
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