Protection device and aircraft equipment subassembly

The utility model relates to an aviation experiment and aviation mapping technique field particularly, relate to a protection device and aircraft equipment subassembly. Protection device includes safety cover, holding box, air exhauster and sealing washer, the safety cover is one side open -ended cover body structure, and the lateral wall is provided with the wind gap, the holding box is located the inside of safety cover, and set up in the lateral wall of safety cover is in order to be used for placing the drier, the air exhauster set up in the lateral wall of safety cover and with the wind gap position corresponds, the sealing washer set up in the opening part of safety cover. The aircraft equipment subassembly include aircraft equipment and protection device, aircraft equipment set up in the inside of protection device's safety cover. The embodiment of the utility model provides a protection device and aircraft equipment subassembly can avoid aircraft equipment wet corruption or high temperature and damage