Grenchen

The single engine airplane departed Grenchen Airport on a local skydiving mission, carrying 11 skydivers and one pilot. After all skydivers left the airplane, the pilot was returning to his base when he lost control of the airplane that entered a dive and crashed in a grassy area located in the vicinity of the airport. The airplane was totally destroyed and the pilot was killed. All 11 skydivers landed safely.

After passing over the Alps and a layer of stratus over the Plateau, the pilot reached the Willisau VOR where he was cleared to initiate an IFR approach to Grenchen Airport runway 25. He completed a standard turn then followed the 290° radial instead of the published 280° radial. When the DME system indicated 7 NM, the pilot realized he was too far from the normal approach track, disengaged the automatic pilot system and elected to gain altitude. In a flaps down/gear down configuration, the aircraft failed to gain sufficient height and struck, in poor visibility due to thick fog, the wooded slope of Mt Balmfluechöpfli (1,289 metres high) located about 12 km northeast of Grenchen Airport. The aircraft disintegrated on impact and the pilot was killed. The female passenger, slightly injured as she was seating in the seat opposite to the direction of flight, was able to walk away to ask for help.