Purpose – The aim of this study is to compile a list of current fume events, to identify the corresponding flights with online flight tracking services, to record the duration of any subsequent layover time and to compare it with the cleaning instructions. Methodology – The online service "The Aviation Herald" was searched. "FlightRadar24" was used for flight tracking. Regarding layovers, only events of one year (2019) were considered. A statistic was created in the form of a pivot table in Excel and evaluated according to various aspects. --- Findings – 425 events were found between 2006 and early 2020, including 51 in 2019. British Airways and Lufthansa were the most affected airlines in absolute terms. 86.7% of all CACE concerns Airbus and Boeing aircraft. It is striking that Airbus A320 Family aircraft are affected much more often than those of Boeing's B737 Family. The ratio here is 2.42. The average layover time after a CACE is 61 hours with a high standard deviation. The minimum layover time is zero (next flight departs as scheduled). The longest layover time was 743 hours (one month). --- Research Limitations – The online service "The Aviation Herald" does not claim to report completely about accidents and incidents. This is especially true for comparatively frequent fume events. Furthermore, the editor himself advises not to take his limited data for a statistic about fume events. Nevertheless, this work makes use of data from "The Aviation Herald" because better data was not openly available. --- Social Implications – Crew members have occasionally expressed the suspicion that airlines are too quick to return aircraft affected by fume events to flight operations, thereby negligently exposing crews and passengers to a health hazard. An attempt is made to objectify this discussion.