What happened
During the final phase of the approach, the pilot confirmed that the landing gear was fully extended and locked while the aircraft was on base leg. However, upon touchdown, the left main landing gear collapsed immediately, followed by the failure of the right main gear and the nose gear.
Following the structural collapse of the undercarriage, the aircraft slid across the runway surface for an estimated distance of 600 to 700 feet before coming to a complete stop. The pilot reported the sequence of events without indicating any pre-impact mechanical anomalies regarding the gear position.
The investigation
Post-accident examination of the aircraft was conducted to determine the root cause of the landing gear failure. A specific gear cycle test was performed on the airframe after the incident occurred. This diagnostic procedure failed to disclose any evidence of a mechanical failure or malfunction within the landing gear system.