Accident Overview
On 21 February 2002 at 1145Z, a Cessna 421, registration ZS-VST, operated privately, sustained a right main undercarriage collapse during landing at Wonderboom Aerodrome (FAWB). The pilot, who held a valid private license with 445.32 total flying hours and 241.22 hours on type, was alone on board and uninjured.
Flight Details
The flight originated from Brakpan-Benoni (FABB) with the intended destination of Wonderboom Aerodrome. Weather conditions were fine with a temperature of +22°C.
Landing Sequence
According to the pilot, after descending, he lowered the undercarriage and received three green down-and-locked indications. Upon touching down on both main wheels and commencing the ground roll on Runway 29, a loud bang was heard, followed by the collapse of the right main undercarriage. The pilot immediately feathered both propellers and shut down both engines. The aircraft lost directional control and veered to the right, exiting the runway.
Damage
Damage was limited to the right propeller blade and the right wing leading edge, which struck a runway light.
Injuries and Fatalities
No injuries or fatalities occurred. The pilot was not injured.
Undercarriage Condition
Following the accident, the drag link and bell crank were found bent. The investigation could not determine whether the undercarriage rigging had been correct prior to the accident.