Post-Maintenance Test Flight Ends in Double Engine Failure and Emergency Landing (MM61651)

Incident Overview A crew consisting of two pilots and two engineers was conducting a post-maintenance test flight when both engines failed during the flight. The failure forced the crew to attempt an emergency landing at Valmontone. All four occupants sustained injuries, and the aircraft was damaged beyond repair. The official investigation identified the probable cause as a double engine failure in flight. No specific aircraft type, registration, date, operator, or location beyond Valmontone was provided in the source material, and no additional details are included to avoid speculation or invention.