Summary
The aircraft was landing on a loose gravel surface runway with a crosswind from the left at 10 - 15 kt. During the landing roll the aircraft veered to the right and the pilot took corrective action in an attempt to return it to the centreline. The aircraft started to recover, but due to skidding on the loose gravel surface it was too late to prevent the right main gear leg from striking a runway flare unit made from steel bore casing welded to a steel base plate, standing 300 mm high, causing the gear to collapse.
