As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REF ASA TASK CARD 78273000 FOUND #2 ENGINE SHORT TIME FAULT CODE 75-20452 AND CODE 75-10452 (REF ASA LP 60387878). GROUNDED - YES. PERFORMED GVI IAW B737-900 AMM 75-32-02 & 75-32-03. FINDINGS WERE ALL VBV RING GUIDE PADS WERE MISSING. NO OTHER DEFECTS NOTED.