As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REVIEW OF EHM DATA SHOWS A SIGNIFICANT SHIFT IN THE ENGINE PARAMETERS, TROUBLESHOOTING HAS BEEN ACCOMPLISHED WITH NFF. REVIEW OF EHM DATA SHOWS A SIGNIFICANT SHIFT IN THE ENGINE PARAMETERS, TROUBLESHOOTING HAS BEEN ACCOMPLISHED WITH NO FINDINGS THAT CAN ACCOUNT FOR THE SHIFT. REMOVE THE ENGINE PER AMM 71-00-02 PG BLK 401 C01. WILL INSTALL ESN 727884. THIS ENGINE WILL NEED TO BE CONVERTED FROM A "564" CONFIG TO A "606" CONFIGURATION.