As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DET 1(<P>TRANSFER TO MDDR # 144548 CAT C DUE DATE 03APR21 IAW DDG 26-16-01-01-01. PERFORMED FIM FAULT CODE 26901545, REMOVED AND REPLACED SMOKE DETECTOR AT POS 1A, 2A, AT STA1160. IAW AMM 26-16-01. OPS CHECK GOOD. THIS CLEARS MDDR #144548</SPAN></P>)