As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FINDING UPPER DECK LINE RUSTING INTERNALLY ON TORNADO ALLEY TURBO EQUIPPED ACFT. THE RUST CONSISTS OF BOTH LARGE AND SMALL PARTICLES THAT ARE EASILY DISLODGED. ACFT THAT HAVE THIS CONDITION EXHIBIT RUST STAINS ON AND AROUND THE FUEL INJECTORS FOUND WHEN THE INJECTORS ARE REMOVED FOR CLEANING. THIS RUST COULD ACCUMULATE AND POSSIBLY CLOG THE FUEL INJECTOR AIR PASSAGES OVER TIME. HAVE NOTICED THIS ON 2 DIFFERENT AIRCRAFT EQUIPPED WITH THE STC SA10588SC AND SE10589SC.