What happened
On 1 January 2008, a Piper PA28-180 departed from Mosselbay Aerodrome for a private flight destined for Beaufort West. The aircraft, registered ZS-ELT, was carrying the pilot and three passengers. While the flight began under sunny conditions, the aircraft later encountered deteriorating weather. At approximately 0940Z, the aircraft struck the side of the Swartberg Mountain at an elevation of 4,985 feet. The impact occurred near the Swartberg Pass, where the wreckage was discovered by motorists shortly after the accident. The crash resulted in four fatalities.
The investigation
Investigators examined the wreckage and recovered data from a GPS unit found on board. The examination of the engine and propeller indicated that the engine was producing power at the moment of impact, ruling out mechanical failure as a cause. The aircraft's maintenance records were found to be in order, with a valid Certificate of Airworthiness and recent inspections completed by an approved organization. Meteorological analysis revealed that a passing cold front had brought moist air into the region, creating orographic clouds and heavy mist. At the time of the accident, visibility was estimated to be 50 metres or less.
Findings
- The primary cause of the accident was the aircraft impacting terrain during periods of poor visibility.
- The pilot was flying without an instrument rating, which likely led to an attempt to maintain visual contact with the terrain while staying below the cloud base.
- GPS data suggests the pilot attempted a turn to head back toward the direction of departure, likely after spotting an opening in the clouds.
- During this maneuver, the aircraft entered thick mist and struck the mountain while in a turn.
- To safely clear the terrain under the prevailing weather conditions, the aircraft would have required an altitude of 7,500 feet.