: In late 2021, risks were identified regarding engine bleed system over-temperature on A330 CEO models, where the bleed valve might fail to close automatically during a fault.

In the world of aviation accident investigation, few phrases strike as much fear into the hearts of safety boards as the words: "Unable to read the black box." In December 2021, that phrase surfaced with alarming specificity in a report concerning an Airbus A330. The keyword that sent ripples through online aviation forums and safety newsletters was concise but chilling:

In 2021, a significant incident came to light when a crack was discovered in the black box of an A330 aircraft. The crack, reportedly found during a routine maintenance inspection, raised concerns about the integrity of the flight recorder and, by extension, the safety of the aircraft.

: Effective late 2021, this directive mandated specialized inspections, including

To confirm, I should check if the user is asking about an actual incident or something else. Since the user specified "12 2021", and the most relevant event is the British Airways incident at LHR on that date. The black box would record the flight data leading up to the bird strike. The user might be interested in the details of the incident and how the black box data was used. Alternatively, there was an incident with an A320, not A330, in December 2021, but that's a different model.