What happened
On August 14, 2013, a Cirrus SR20, registration SE-LUH, was conducting a training flight over Tysfjorden, Norway. The aircraft, operated by a flight school from Lund University in Sweden, was traveling from Bardufoss to Bodø with two students on board. While cruising at 5,000 feet, the crew noticed a large red 'X' appear on the Primary Flight Display (PFLE). Shortly after this instrument failure, white smoke began to emanate from the instrument panel.
The crew immediately declared a 'Mayday' to Bodø Control. Following the 'Cabin fire in flight' checklist, they deactivated all electrical power sources, including both batteries and the alternator. Due to uncertainty regarding whether the smoke originated from the engine or the cockpit, the crew also performed the 'Engine fire in flight' checklist and shut down the engine while identifying a suitable field for an emergency landing. After approximately 30 seconds, the smoke ceased. The crew decided to restart the engine and Battery 1 to restore communication, then proceeded to Evenes Airport. The aircraft landed safely on runway 35 at 13:11 local time.
The investigation
The Norwegian Safety Investigation Authority (NSIA) examined the electrical systems and the instrument panel following the incident. The investigation confirmed that the smoke was not caused by an engine fire but originated from the power supply of the Primary Flight Display (PFD). The investigation also reviewed the crew's emergency procedures and their decision-making process during the smoke development.
Findings
- The smoke was caused by heat damage within the PFD power supply.
- The crew responded quickly and correctly by declaring an emergency and following established checklists.
- The decision to restart the engine and continue to an airport was appropriate, as shutting down the engine of a single-engine aircraft over rugged terrain carries significant risks.
Safety action
Following the incident, the faulty PFD was replaced, and the aircraft was returned to service.