What happened
A landing was executed with the main landing gear down and locked, while the nose gear remained in the fully retracted position. The incident occurred because the nose gear failed to extend prior to touchdown.
The investigation
Investigation revealed that a piece of unidentified equipment had not been properly secured during previous maintenance work. This loose component was mounted immediately above the nose wheel extension and retraction mechanism. During flight, aircraft vibration caused the unsecured equipment to shift position. The displaced object physically obstructed the mechanical linkage, preventing the nose gear from extending.
Findings
The primary factor contributing to the event was the failure of the nose landing gear to extend. This malfunction was directly caused by an obstruction in the retraction mechanism. The obstruction consisted of equipment that had been inadequately secured during prior maintenance activities. Vibration during flight moved this loose item into a position where it blocked normal gear operation.
Safety message
Proper securing of all components during maintenance is critical to prevent foreign object debris or loose items from interfering with flight control systems and landing gear mechanisms.