Incident Overview
On 19 February 2022, a Boeing 737-800 (registration SP-ESI) operating as flight ENT4598 from HESH to EPWA experienced a serious incident. While cruising in the Cyprus Flight Information Region (FIR LCCC), the first officer lost consciousness. The crew initiated first aid procedures, performed an emergency descent, and diverted to Larnaca Airport (LCLK) for a safe landing.
Investigation
The Polish State Commission on Aircraft Accident Investigation (PKBWL) took oversight of the investigation after contacting the Cyprus authorities, who did not respond within 30 days. The operator conducted its own formal inquiry. The first officer was referred for medical assessment and subsequently obtained a Class 1 medical certificate. Additionally, the first officer completed a successful Operator Proficiency Check on a simulator.
Findings
The investigation established that the incident was caused by a health indisposition of the first officer. No contributing circumstances were identified, and no safety recommendations were issued.
Operator Actions
Following the incident, the operator published the final report in its Flight Safety Bulletin and implemented preventive measures, including medical evaluations and simulator training for the first officer.