As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN "A" INSPECTION, TWO METAL PARTICLES WERE DISCOVERED IN THE AFT TRANSMISSION OIL FILTER. THESE METAL PARTICLES ARE IDENTIFIABLE AS BROKEN SEAL TANGS. TRANSMISSION WAS REPLACED AND RETURNED TO CHIR823C. AFT TRANSMISSION WAS REPAIRED. ALL ASSOCIATED DISCREPANCIES WERE CORRECTED IAW CHI C07-5 CR/OM SEC 62-10-04 REV 4 DATED MAY 09, 2017.