What happened
During the initial climb phase toward 7,000 feet following departure from Örnsköldsvik Airport, the crew observed an oil pressure warning light in the left engine. In response to this indication, the flight crew deactivated the left engine. However, they encountered difficulties attempting to feather the propeller. During this process, an electrical fuse blew, which resulted in the loss of all instrument lighting on the left side of the cockpit.
After receiving clearance to return to the airport, the aircraft completed its turn. During the final approach, the pilot had to apply maximum rudder and elevator deflection to compensate for the drag produced by the unfeathered propeller. The aircraft type landed approximately 30 meters to the left of the runway centerline and continued to roll for several dozen meters before stopping. There were no injuries among the 17 occupants, though the aircraft sustained total loss damage.
Findings
Investigations into the incident identified several contributing elements:
- An oil leak within the left engine necessitated the engine shutdown during the climb.
- The inability to feather the propeller created significant aerodynamic drag, which forced the pilot to use extreme control inputs, leading to the landing misalignment.
- Electrical issues occurred because the left side of the instrument panel was not properly isolated from the right side following the blown fuse.
- An incorrect adjustment of the speed control trigger was noted.
- The crew did not strictly adhere to established checklist procedures.