What was found
DURING CRUISE FLIGHT, CREW AND PATIENT COMPLAINED OF CARBON MONOXIDE POISONING SYMPTOMS INCLUDING LIGHT HEADEDNESS, SLEEPINESS AND HEADACHE. HEATER WAS IN OFF POSITION, BOTH SWITCHES, BUT HEAT AND FUMES WERE COMING FROM HEATER VENT IN AFT COMPARTMENT OF AIRCRAFT. RECYCLED HEATER, PROBLEM DID NOT GO AWAY. OPENED WINDOWS TO VENT AIRCRAFT AND DIVERTED TO NEAREST AIRPORT. MAINTENANCE PERFORMED AS FOLLOWS: THE DUCT ASSY LOCATED ON TOP OF THE COMPRESSOR ASSY WAS FOUND LOOSE TO THE COMPRESSOR ASSY AND REPLACED A GASKET ON THE ENGINE OIL FILTER HOUSING THAT APPEARED TO BE SEEPING. OPS, LEAK CHECK, AND HEATER OPERATION CHECK WAS GOOD WITH NO SMELL OR LEAKS FOUND.