What happened
On June 7, 2003, an Enstrom 280FX helicopter, registration G-OPDM, was conducting a local flight from a private pad in Glenbeigh, Co. Kerry. Shortly after reaching an altitude of 600 feet while crossing a small estuary, the pilot heard unusual noises from the rear of the aircraft. This was followed by a noticeable drop in engine RPM.
Faced with a loss of power, the pilot initiated an autorotation to perform an immediate landing on a nearby beach. During the landing attempt, the helicopter struck the sand with significant force. The impact caused the left skid to collapse and the main rotor to strike the ground. The force of the impact was severe enough that the tail rotor assembly separated from the aircraft and the tail boom tore away from the fuselage. Despite the structural damage, both occupants were able to exit the helicopter unaided without serious injury.
The investigation
Investigators examined the engine, the turbocharger, and the wastegate linkage to determine if a mechanical failure caused the power loss. While the wastegate linkage was found to have been tightened excessively—requiring much higher force to move than specified—testing concluded this was not the cause of the power loss. Furthermore, engine tests showed the engine was capable of delivering rated power, and no pre-existing defects were found in the fuel system or turbocharger that would explain the RPM drop.
The investigation also reviewed the flight path and pilot experience. While the pilot reported a straight-line approach to the beach, eyewitnesses on the nearby Dooks Golf Course described the aircraft performing maneuvers at low altitudes, including hovering over a tee box and making turns near the course. The investigation also noted that the pilot, who was 17 years old at the time, had limited experience as pilot-in-command of this specific aircraft type.
Findings
- There was conflicting evidence between the pilot's account and eyewitness observations regarding the actual flight path prior to the crash.
- No mechanical defect or engine failure was identified as the cause of the engine RPM drop.
- The pilot's experience level and the low-altitude maneuvers observed near the golf course were noted as factors in the operational context of the accident.