What happened
On 15 February 2012, an ATR 42-50 and operated by České aerolinie, a.s., was performing a scheduled flight from Warsaw (EPWA) to Prague-Ruzyně (LKPR). During the initial approach to runway 31, while descending through FL 120, the first officer noticed an increase in airspeed and asymmetrical engine thrust. Upon checking the commander, the first officer discovered that the pilot was unresponsive.
The first officer immediately took control of the aircraft, stabilized the flight parameters, and declared an emergency. He summoned the cabin crew to the cockpit to assist with the incapacitated commander. The crew provided immediate first aid, including the use of an oxygen mask and oxygen shower. Despite the efforts of the crew and the rapid arrival of emergency medical services on the ground, the commander could not be revived.
The aircraft landed safely on runway 31 under challenging weather conditions, which included heavy snow showers and wind gusts. There were no injuries to the passengers or the remaining crew members.
The investigation
The ÚZPLN investigation examined flight data recorder (FDR) and cockpit voice recorder (CVR) data, radio communications, and medical records. The investigation also reviewed the crew's qualifications and the aircraft's airworthiness. Medical experts performed an autopsy and forensic analysis to determine the cause of the commander's sudden incapacitation.
Findings
- The cause of the incident was the sudden death of the commander due to a rare, hidden cardiovascular condition, specifically idiopathic cystic medionecrosis of the aorta.
- The first officer reacted correctly and promptly to the medical emergency, maintaining control of the aircraft and following established procedures.
- The cabin crew followed the Cabin Crew Operating Manual (CCOM) procedures for crew member incapacitation, including securing the cockpit and providing first aid.
- The aircraft was airworthy and the crew held valid licenses and medical certificates.
- Weather conditions at the time of landing, while involving snow and turbulence, were within the operational limits for the aircraft and the crew.