What happened
On 8 November 2020, a Cessna 680A Citation Latitude, registered as CS-LTC, was conducting a commercial flight under instrument flight rules from Frankfurt to Palma de Mallorca. While the aircraft was cruising at flight level 430, the crew encountered a pressurization failure. Due to the loss of cabin pressure, the flight crew was required to perform an immediate descent to a lower altitude.
Following the loss of pressure, the pilots decided to abandon the original flight plan and divert to Geneva Airport (LSGG) to ensure the safety of the occupants.
The investigation
The Swiss Transportation Safety Investigation Board (SUST) initiated an investigation into the incident. The preliminary information indicates that the aircraft experienced a malfunction in its ability to maintain cabin pressure at high altitudes. The investigation focused on the sequence of events leading to the emergency descent and the technical nature of the failure during the cruise phase of the flight.