What happened
The pilot initiated a takeoff run toward the west across a frozen lake surface. Conditions on the ice were characterized by a crusty and rough texture. During the lift-off phase, the nose ski failed to clear the surface properly and began striking the fuselage of the aircraft.
Recognizing the compromised situation, the pilot elected to abort the takeoff and land straight ahead on the remaining available ice. The landing was executed with the main wheels and skis making contact first. However, as the nose strut touched down, it penetrated through the snow crust. This impact caused the strut to collapse, bringing the aircraft to a stop in a nose-down attitude.
The investigation
Examination of the accident site and the aircraft revealed that the primary mechanical failure was associated with the landing gear structure. The nose strut had collapsed due to the force of hitting the hard snow crust during the landing phase. The initial takeoff failure was attributed to the rough ice conditions affecting the nose ski clearance.
Findings
- N00000 (registration placeholder for context) - Aircraft type not specified in source text, but involved in incident.
- The surface condition of the frozen lake was a critical factor. The ice and snow were crusty and rough at the point of lift-off.
- The nose ski failed to function correctly during takeoff, leading to contact with the fuselage.
- Nose strut collapse occurred when the strut penetrated the snow crust upon touchdown.
- The aircraft came to rest on its nose following the structural failure.
Safety message
Pilots operating from frozen lakes must carefully assess surface conditions. Crusty or rough ice can interfere with ski performance during takeoff and landing, potentially leading to ground strikes or structural failures. Adequate runway length and surface integrity are essential for safe operations in these environments.