As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AFT LAV WARNING IN FLIGHT. CIRCUIT BREAKERS PULLED IAW CHECKLIST. RETURNED TO THE FIELD. LANDING UNEVENTFUL. INSP & FOUND NO DEFECTS NOTED WITH LAV SMOKE DETECTOR. OP'S CHECKS ARE GOOD. INSP & FOUND THAT NR1 & NR2 ENGINE RECOVERY WASHES WERE PERFORMED PRIOR TO 1ST FLIGHT OF THE DAY. PERFORMED AMM TASK 72-00-00-100-801-A01 STEP 4.H. (REMOVAL OF ODOR & SOAP FUMES IN ECS SYS) & HS72-0021, 26-16-00-710-801-A01. FUMES & ODOR NO LONGER PRESENT IN ACFT. RETURNED TO SERVICE.