Thermally actuated passive gas turbine engine compartment venting

A thermally actuated venting system comprising:

• a thermally actuated air vent for opening an air vent outlet in a gas turbine engine associated compartment, the vent outlet located at or near the top of the compartment,
• a passive thermal actuator in the compartment, the thermally actuated air vent including a hinged door operably connected to the passive thermal actuator for opening the vent outlet, a thermal fuse incorporated in the thermal actuator for closing the door during a fire in the compartment,
• the thermal actuator operable for opening the thermally actuated air vent based on a temperature of the compartment and venting hot air from the compartment, the thermal actuator including a piston disposed within a cylinder, a chamber within the cylinder between the piston and a bottom wall of the cylinder, a piston rod extending upwardly from the piston through an aperture in a top wall of the cylinder, a distal end of the piston rod connected to the hinged door, and
• a phase change material in the chamber having a liquid state below a predetermined actuation temperature and a gaseous state above the predetermined actuation temperature,
• the thermal fuse including an annular cylinder wall of the cylinder or a portion of the cylinder wall made of a fuse material having a melting point above the predetermined actuation temperature and the melting point being in a range between 786 and 1202 degrees Fahrenheit.