As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT HAS A TURBO NORMALIZING SYS INSTALLED UNDER STCS SA10588SC & SE10589SC. FOUND FUEL STAINS ON SEVERAL COMPONENTS IN THE REAR SECTION OF THE ENGINE COMPARTMENT. INVESTIGATION REVEALED A SIGNIFICANT LEAK FROM THE MIXTURE CONTROL SHAFT ON THE ENGINE DRIVEN FUEL PUMP.