As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CONJUNCTION WITH LT & RT FUEL INJECTOR MANIFOLDS, ARE CAUSING EXCESSIVE EXHAUST FUMES IN THE COCKPIT. PART TIME ONLY REACHED 215.6 HOURS BEFORE BECOMING CLOGGED INTERNALLY CAUSING THE EXCESSIVE EXHAUST FUMES. PREVIOUS ISSUES HAVE ALSO NOT REACHED ITS 400 HOUR REPLACEMENT. REPLACING THE PREFERRED INJECTOR ALONG WITH THE LT & RT FUEL INJECTOR MANIFOLDS HAS SUCCESSFULLY SOLVED THE EXCESSIVE EXHAUST FUMES.