Fatal Aerial Survey Accident Involving Ikarus C42B ZU-ETF

Accident Overview and Flight History On 26 January 2008, an Ikarus C42B aircraft, registration ZU-ETF, operated by Spatial Intelligence (Pty) Ltd., crashed into a valley on a farm between Howick and Underberg, South Africa. The aircraft was conducting an aerial survey flight from Howick Aerodrome (FAHC). The flight was the second of the day for the aircraft and crew, commencing after a refuelling stop. The intended route was to Margate Aerodrome via Underberg and back to Howick. The aircraft carried two occupants: the pilot and a surveyor. ## Personnel and Aircraft Information The pilot-in-command was a 25-year-old South African male holding a valid commercial licence with a night rating. His total flying experience was 229.2 hours, with 10.0 hours on type. The aircraft, an Ikarus C42B manufactured in 2007, had 41.0 airframe hours at the time of the accident. It was powered by a Rotax 912 ULS engine and equipped with a Garmin 296 GPS. ## Accident Sequence and Investigation The aircraft crashed approximately 10 minutes after take-off. The pilot was flying into a valley, following the contour of the earth from low to high ground. After clearing power-lines in the flight path, the aircraft became trapped between two sections of high terrain with no escape route. A witness observed the aircraft pitch up before impacting the terrain. The aircraft was completely destroyed by the post-impact fire, and both occupants sustained fatal injuries. ## Probable Cause and Contributing Factors The probable cause was that the aircraft entered a dead-end valley with rising terrain on both sides and was unable to clear the rising terrain. Evidence suggested the rising terrain exceeded the aircraft's climb-rate capability. Ground scars indicated the right-hand wing stalled first. An engine inspection found no mechanical issues contributing to the accident. The Garmin 296 GPS was recovered, and flight tracks were analyzed using Geographic Information System software.