What happened
During a scheduled test flight following recent maintenance work, an aircraft experienced a simultaneous loss of power in both engines. The flight was being conducted by a crew consisting of two pilots and two engineers. As the dual engine failure occurred while en route, the crew was forced to execute an emergency descent to locate a suitable landing site.
The aircraft ultimately attempted an emergency touchdown in the vicinity of Valmontone. The impact resulted in significant damage to the airframe, rendering the aircraft a total loss. All four occupants on board sustained injuries during the incident.
Findings
Investigations into the event determined that the primary factor leading to the emergency was a double engine failure occurring while the aircraft was in flight.