The nose wheel fork may flex and bend the square steel plate welded to the structure resulting in possible metal fatigue and eventual cracking.” It is believed that the weld cracking is due to “excessive hard NLG landing, exceeding the design limits. An investigation by Zenair did not reveal a root cause. Photo 2: Cracking on the NLG leg and plate weldĪ review of Service Difficulty Reports did not find additional occurrences. Inspection of the aeroplane showed that the plate welded onto the bottom of the nose gear leg (Photo 1) failed, causing the nose gear fork to separate from the nose gear leg.
The remaining nose gear leg contacted the runway surface and supported the nose but the reduced clearance allowed the propeller blades to contact the runway. While the second landing was also smooth, when the nose touched down, the instructor noticed the nose gear fork exit on the left side of the aeroplane and shot past the nose of the aeroplane. The incident report states that the first landing by a flight instructor and student was smooth and uneventful.
The Federal Aviation Administration (FAA) informed Transport Canada Civil Aviation (TCCA) of a NLG weld failure and crack findings of another NLG weld of a CH2000 aeroplane.
This CASA is issued to inform owners and maintainers of the CH2000 series aeroplanes of a potential unsafe condition regarding the cracking of the Nose Landing Gear (NLG) weld. Owners and maintainers of Zenair CH2000 series aeroplanes
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