A **UPS MD-11F freighter** that crashed in **Kentucky** in **November**, killing **15 people**, had a structural flaw identified by **Boeing** **15 years ago**, according to the **US National Transportation Safety Board (NTSB)**. The accident occurred after an engine separated during takeoff.

• Boeing had previously found fractures in the engine mounting assembly on similar aircraft on **four occasions**, affecting **three different aircraft**.
• The **NTSB** report indicates **Boeing** had concluded the issue "would not result in a safety of flight condition" despite issuing a non-binding "service letter" in **2011** recommending visual inspections.
• The crash resulted in **15 fatalities**, including **three crew** and **12 people on the ground**.