ASN Aircraft accident Beechcraft 99 Airliner SE-IZO Oskarshamn Airport (OSK)
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Status:Accident investigation report completed and information captured
Date:Monday 8 May 1989
Type:Silhouette image of generic BE99 model; specific model in this crash may look slightly different
Beechcraft 99 Airliner
Operator:Holmström Flyg
Registration: SE-IZO
MSN: U-48
First flight: 1968
Total airframe hrs:23095
Engines: 2 Pratt & Whitney Canada PT6A-28
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 14 / Occupants: 14
Total:Fatalities: 16 / Occupants: 16
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:near Oskarshamn Airport (OSK) (   Sweden)
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Stockholm-Arlanda Airport (ARN/ESSA), Sweden
Destination airport:Oskarshamn Airport (OSK/ESMO), Sweden
The Beech 99 was on short finals when it suddenly pitched up. It entered a steep dive to the left and crashed 150 m short of the runway 19 threshold and left of the extended centreline. The centre of gravity was too far aft (45,0 % MAC whereas the aft limit was 38.4%) due to weight disparity between passengers.
The first officer, who was Pilot Flying on the accident flight, had limited experience on the Beech 99 (28 hours).

Probable Cause:

Probable cause:
The accident was probably caused by the fact that the pilot could not compensate for the rapid pitch-up that occurred when the wing flaps were selected out while the engines were running at high power.
Contributing factors have been:
* The aircraft was extremely tail-heavy.
* The crew's training and overall experience on the aircraft type was limited.

Accident investigation:
Investigating agency: SHK Sweden
Status: Investigation completed
Duration: 283 days (9 months)
Accident number: C1990:12
Download report: Final report

Centre of Gravity outside limits
Loss of control

» ICAO Adrep Summary 4/89 (#61)


photo of Beechcraft-99-SE-IZO
accident date: 08-05-1989
type: Beechcraft 99
registration: SE-IZO

This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Stockholm-Arlanda Airport to Oskarshamn Airport as the crow flies is 267 km (167 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Beech 99

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