Narrative:
The no. 1 engine low oil pressure warning light came on while climbing through 7000 feet. When the engine was stopped, a fuse blew and only the right side instruments lights functioned. The crew returned to the airport and preformed an ILS approach. The prop hadn't feathered so rudder and elevator were fully deflected. The aircraft touched down 30 m left of the runway.
Probable cause: (translated from Swedish)
Due to the fact that left propeller did not go to feathering mode, a drag arose which the pilot could not compensate with trim and rudder, so that the aircraft landed on the side of the runway.
Contributing factors:
- Oil leakage in the engine which made it necessary to stop the left engine and feather the propeller.
- Power supply problems caused by the left side not having been isolated from the right side.
- A misrigged feathering handle
- Inadequate checklists.
| Status: | Accident investigation report completed and information captured |
| Date: | Saturday 21 January 1989 |
| Time: | 17:47 |
| Type: |  Swearingen SA226-TC Metro II |
| Operator: | Muk Air Taxi |
| Registration: | OY-ARI |
| MSN: | TC-317 |
| First flight: | 1979 |
| Total airframe hrs: | 8009 |
| Engines: | 2 Garrett TPE331-3UW-304G |
| Crew: | Fatalities: 0 / Occupants: 2 |
| Passengers: | Fatalities: 0 / Occupants: 15 |
| Total: | Fatalities: 0 / Occupants: 17 |
| Aircraft damage: | Damaged beyond repair |
| Location: | Örnsköldsvik Airport (OER) ( Sweden)
|
| Phase: | Landing (LDG) |
| Nature: | Domestic Scheduled Passenger |
| Departure airport: | Örnsköldsvik Airport (OER/ESNO), Sweden |
| Örebro-Bofors Airport (ORB/ESOE), Sweden |
The no. 1 engine low oil pressure warning light came on while climbing through 7000 feet. When the engine was stopped, a fuse blew and only the right side instruments lights functioned. The crew returned to the airport and preformed an ILS approach. The prop hadn't feathered so rudder and elevator were fully deflected. The aircraft touched down 30 m left of the runway.
Probable Cause:
Probable cause: (translated from Swedish)
Due to the fact that left propeller did not go to feathering mode, a drag arose which the pilot could not compensate with trim and rudder, so that the aircraft landed on the side of the runway.
Contributing factors:
- Oil leakage in the engine which made it necessary to stop the left engine and feather the propeller.
- Power supply problems caused by the left side not having been isolated from the right side.
- A misrigged feathering handle
- Inadequate checklists.
Accident investigation:
 |
|
Sources:
» ICAO Adrep Summary 4/89 (#113)Photos
Map
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 Örnsköldsvik Airport to Örebro-Bofors Airport as the crow flies is 507 km (317 miles).
Distance from Örnsköldsvik Airport to Örebro-Bofors Airport as the crow flies is 507 km (317 miles).
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.
The Aviation Safety Network is an exclusive service provided by:
