The search results provide various insights into different types of disasters and incidents, but none directly address the specific wing collapse in a Canberra disaster. However, general contributing factors to wing collapses or structural failures in aircraft can include:
- Design Flaws: Inherent weaknesses in the wing's design that may not be apparent until subjected to real-world stress.
- Maintenance Issues: Poor or insufficient maintenance can lead to the degradation of the wing's structure over time.
- Material Failure: The use of substandard materials or the failure of materials over time due to fatigue.
- Environmental Factors: Extreme weather conditions or other environmental impacts that can place undue stress on the wing.
- Accident-Related Damage: Damage sustained in an accident that may not be immediately apparent but can lead to a wing collapse under certain conditions.
For the specific incident in Canberra, more detailed information would be needed to accurately determine the contributing factors. It's important to refer to official investigations and reports for precise details on such incidents.