Incident Overview
On 15 November 2019, a SAAB 340A aircraft, registration SP-KPU, experienced a failure of the standby artificial horizon (Stby Horizon) during a flight between ENAL and EKCH. The malfunction did not impact the continuation of the flight.
Cause and Contributing Factors
The investigation, concluded by the Polish State Commission on Aircraft Accident Investigation (PKBWL) on 13 December 2021, determined that the failure was caused by wear of the instrument. A contributing circumstance was the long period of use and extended operating time of the device.
Preventive Measures
The operator conducted briefings for flight and maintenance personnel regarding the circumstances and course of the event. No additional safety recommendations were formulated.