Accident Overview
On 26 October 2002 at 1535Z, a Piper PA-28-160 aircraft, registration ZS-MKZ, departed Lanseria Aerodrome on a ferry flight to Brakpan Aerodrome. The pilot, the sole occupant, held a valid private pilot licence and was rated on the aircraft type, with 336 hours on type and 337 total flying hours.
Flight and Power Loss
After departure from Runway 06L, the pilot executed a right-hand turnout. The rate of climb was observed at 200 feet per minute. Shortly after, the engine RPM began fluctuating between 2450 and 1700 RPM, accompanied by a decay in airspeed and rate of climb. The aircraft had reached an altitude of 5400 feet ASL (QNH 1019 hPa) with an indicated airspeed stabilizing at 75 MPH. Unable to maintain height, the pilot selected a field to the right for a forced landing.
Attempted Remedies
The pilot applied corrective actions including selecting the electric fuel pump and switching from the right to the left fuel tank, but these were ineffective. Adjusting the fuel-air mixture (richening or leaning) and applying carburettor heat further decreased power. The pilot then closed the throttle and prepared for landing in an open field just outside the airport perimeter, in fine weather conditions (wind 060/10, temperature +26°C).
Outcome and Investigation
The pilot was not injured. The aircraft sustained substantial damage, and the farm perimeter fence also sustained substantial damage. A mandatory periodic inspection had been carried out and certified on 25 October 2002 at 3358.59 airframe hours, as required. Investigation revealed that the fuel filter bowl was incorrectly mounted, causing a severe fuel leak and consequent power loss due to fuel starvation.