Which load factor is applicable for the King Air 350 when operating with flaps down?

The applicable load factor for the King Air 350 when operating with flaps down is indeed +2.0g's and -0.0g's. This specification indicates the aircraft's structural integrity and performance limitations while flying in a configuration that includes additional drag and lift provided by the flaps.

When flaps are extended, the aircraft is typically in a slower flight mode, such as during approach or landing. The limitation of +2.0g's means the aircraft can withstand forces up to double gravity without risk of structural failure, which is crucial for safety during maneuvers that may involve turbulence or changes in flight path. Meanwhile, the -0.0g's limitation indicates that the aircraft is not designed to experience any negative load factors in this configuration, which is vital for maintaining control and preventing potential stall or other aerodynamic issues.

This load factor ensures that operators are aware of the risks associated with flying the King Air 350 in a flaps-down configuration and that they adhere to limitations for safe operation. The other options suggest different load factors that do not align correctly with the aircraft’s operational specifications as defined in manufacturer guidelines, reflecting either excessive negative load capabilities or higher positive limits than permissible in certain configurations.