Compound engine assembly with confined fire zone

A compound engine assembly comprising:

• an engine core including at least one internal combustion engine in driving engagement with an engine shaft;
• a gearbox module including a gearbox module casing containing at least one gear train;
• a turbine section outside of the gearbox module casing, the turbine section having an inlet in fluid communication with an outlet of the engine core, the turbine section including at least one turbine rotor connected to a turbine shaft, the turbine shaft extending into the gearbox module casing and in driving engagement with the engine shaft through one of the at least one gear train of the gearbox module;
• a compressor outside of the gearbox module casing, the compressor having an outlet in fluid communication with an inlet of the engine core, the compressor including at least one compressor rotor in driving engagement with at least one of the turbine shaft and the engine shaft;
• wherein the turbine section and the engine core are located on a same side of the gearbox module casing and the compressor is located on the opposite side of the gearbox module casing;
• and
• wherein a firewall extends radially outwardly from the gearbox module casing, the compressor being located on one side of the firewall, and the turbine section and the engine core being located on the other side of the firewall.