Flight Crew Private
Flight Crew Last 90 Days 10; Flight Crew Total 900; Flight Crew Type 250
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Diverted; Flight Crew Landed As Precaution; General Declared Emergency
Aircraft
[I had an] in-flight emergency. Exhaust directly entered cabin due to opening of fuselage floor pan directly behind exhaust pipes. Extreme heat and exhaust entered cabin causing a rapid degrading of cockpit conditions. Mayday called. [I] informed responders that landing will be made at closest airport.
Pilot of an experimental aircraft reported declaring an emergency and diverting to nearest suitable airport when extreme heat and exhaust began entering cockpit from an opening in the fuselage floor pan.