When Manufacturer Denials Hide Risk

The NTSB report suggests Boeing documented recurring fractures in an MD‑11 engine mount but advised owners the condition was not a 'safety of flight' issue; years later a fracture coincided with a fatal UPS crash. This pattern — service‑letter downplaying, repeated part failure across aircraft, and delayed regulatory/civilian action — points to a governance gap in post‑market aviation safety and corporate accountability. — It forces urgent policy choices about mandatory post‑market action, transparency of service letters, corporate liability, and how regulators must treat recurring component fractures from legacy designs.