As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEALING FELT ON AIR BOX VALVE MISSING FROM OUTER EDGES EXCEPT FOR A 1 INCH SECTION THAT WAS 'HANGING ON'. THE FELT MATERIAL IS SANDWICHED BETWEEN 2 METAL PLATES WITH SOME FELT PROTRUDING TO PROVIDE SEAL. THE PROTRUDING PART WAS ALMOST ALL MISSING. THE POTENTIAL DANGER COULD BLOCK OR RESTRICT FUEL FLOW IF LODGED ACROSS VENTURI. IN THIS INSTANCE, MOST MATERIAL WAS GONE, SO NO PROBLEM EXCEPT FOR SEALING.