Incident Overview
A multiengine airplane experienced a nose landing gear collapse while completing the landing roll. The certified flight instructor (CFI) was performing the landing, while the student pilot kept his hands on the control yoke to follow the instructor's inputs. As the airplane approached the runway, the CFI configured it for a power-off landing by retarding the throttles. She noted that all three landing gear indicator lights in the cockpit were illuminated green, indicating the gear was down and locked. She also visually confirmed the gear extension through a small mirror on the wing.
Sequence of Events
Upon touchdown, the main landing gear made contact with the runway. At that moment, the student pilot reached for the landing gear handle, mistaking it for the flap handle. The CFI waved her hand to block his movement and told him "no." Shortly after, the nose landing gear collapsed, causing the airplane to slide on its nose. After the airplane came to a stop, the CFI observed that the landing gear handle was still in the "down" position. The student pilot stated that he had not touched the landing gear handle.
Post-Accident Inspection
A mechanic who repaired the airplane reported that the landing gear and its linkages were intact, with no anomalies noted. The actuator could not be tested due to the extent of the damage sustained during the collapse.
Conclusion
The source does not provide a probable cause for the collapse.