**Incident Overview** On the night of May 22-23, a Cathay Pacific Airbus A350-900 (flight CX156) from Brisbane to Hong Kong experienced severe turbulence approximately two hours before landing, injuring six cabin crew members and four passengers. The aircraft, registered B-LRV, landed safely at Hong Kong International Airport around 6:45 AM local time. Eight of the injured were taken to hospital with minor injuries such as bruises and abrasions; none were life-threatening. The incident occurred during breakfast service in economy class, when many passengers and crew were not seated with seatbelts fastened. **What Happened Onboard** Passengers described a sudden, violent drop, likening it to a free-fall from a drop tower. Items such as phones, drinks, and meal trays were thrown to the ceiling. The cabin crew, who were moving through the aisles with service carts, were particularly vulnerable. The captain later apologized, explaining that the turbulence was caused by a weather phenomenon that gave very little warning. The flight continued normally after the event, with no technical issues reported. **Nature of the Turbulence: Clear-Air Turbulence (CAT)** Initial reports suggest the aircraft encountered a convective system or a rapidly developing thunderstorm cell. However, further analysis points to clear-air turbulence (CAT), which occurs near strong wind gradients or jet streams and is notoriously difficult to detect because it happens in cloudless skies. Even modern aircraft like the A350, equipped with advanced weather radar, cannot always anticipate CAT, as radar primarily detects precipitation. This event underscores the importance of pilot training in recognizing conditions conducive to CAT and adhering to seatbelt signs. **Investigation and Safety Implications** Hong Kong's Air Accident Investigation Authority (AAIA) will launch a technical investigation, analyzing flight data, weather parameters, radio recordings, and crew testimonies. Cathay Pacific is cooperating fully and conducting its own internal review. For ATPL and ATC students, this incident is a stark reminder of the real-world risks of turbulence, the critical role of cabin crew safety procedures, and the need for effective communication between pilots and ATC regarding weather avoidance. **MyATPS Angle: What Students Should Learn** - **ATPL students**: Study the limitations of weather radar and the phenomenon of CAT. Understand how to interpret SIGMETs and PIREPs for turbulence avoidance. Review procedures for managing in-flight injuries and coordinating with ATC during emergencies. - **ATC students**: Learn how to relay turbulence reports (PIREPs) between aircraft and provide timely weather updates. Understand the importance of vectoring aircraft around known convective activity and the challenges of CAT detection. This incident reinforces that even routine flights can face sudden hazards, and thorough preparation is key to safety.