What happened
On 04 December 2008, a private flight involving a Robinson R22 Betta II, registration ZS-RRG, departed from New Tempe aerodrome. After an initial leg of the flight, the pilot landed at Aandglover farm to collect a passenger. Following the pickup, the helicopter climbed to approximately 4,900 feet above mean sea level while traveling in a westerly direction.
As the aircraft turned south and then east, crossing the N6 national road at 55 knots, it experienced a sudden and rapid loss of altitude. Despite the pilot's attempt to raise the collective to recover height, the aircraft continued to descend. The helicopter struck the ground on its left skid, causing the aircraft to yaw and flip over. The impact resulted in the destruction of the left skid, damage to the main rotor blades and head, and the separation of the tail section from the tail boom. The engine ceased operation immediately following the impact. Both the pilot and the passenger escaped the wreckage without injury.
The investigation
SACAA AIID investigators examined the wreckage and interviewed the pilot to determine the cause of the descent. The investigation confirmed that the Robinson R22 Betta II was well-maintained, with its last mandatory periodic inspection completed in September 2008. The aircraft was also operating within its certified maximum take-off weight.
Technical analysis of the wreckage showed no evidence of mechanical failure, engine malfunction, or fuel issues prior to the impact. The investigation found that the aircraft's flight controls and engine were intact and performing satisfactorily before the loss of altitude occurred. Meteorological conditions at the time were favorable, with good visibility and light winds.
Findings
- The pilot held a valid private pilot license with the appropriate type rating.
- The aircraft was maintained according to approved schedules and held a valid Certificate of Airworthiness.
- The aircraft was within weight limits and sufficiently fueled for the flight.
- The primary cause of the accident was a loss of control leading to terrain impact.
- A significant contributing factor was the pilot's low level of flying experience.
- Investigators noted the possibility that the pilot's attention may have been diverted, preventing a timely corrective response to the high sink rate.