Landing gear downlock safety pins are provided for which landing gear assembly?

Landing gear downlock safety pins are essential components designed to ensure that the landing gear remains in the down position during landing and taxiing, providing additional safety to the aircraft. These pins are used in both the nose gear and the main gear assemblies, as these parts of the landing gear are critical to maintaining the aircraft's stability and safety during ground operations.

Using safety pins in both the nose gear and main gear assemblies helps prevent accidental retraction of the gear while the aircraft is on the ground. This is particularly crucial since an inadvertent gear retraction could lead to severe accidents or compromises in safety. The inclusion of safety pins across both assemblies ensures that all landing gear components are secured and that the aircraft is ready for ground operations.

By contrast, options that mention combinations of only the nose gear or main gear assemblies do not provide the comprehensive safety measure afforded by placing safety pins in both types of landing gear. Including just one of these assemblies could leave other parts vulnerable, which is not in line with aviation safety standards. Thus, the correct response confirms that both the nose gear and main gear assemblies are equipped with downlock safety pins, ensuring full coverage and security during operations.