As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2453. MASTER WARNING "LAV SMOKE" AT FL350. NO SMOKE, FUMES OR EVIDENCE OF FIRE FROM FA"S. PAX WAS NOT VAPING BUT WAS QUITE TALL. SUSPECT HAIR RUBBING SMOKE DET. AFT LAV AFFECTED. REMOVED FROM SERVICE. GVI OF AFT LAV SMOKE DETECTOR REVEALS NO DEFECTS. C/W OP'S TEST OF AFT LAV SMOKE DETECTOR. REF E175 AMM TASK 26-14-01-710-801-A. OP'S TEST GOOD. NO DEFECTS NOTED. A/C RETURNED TO SERVICE. NO PARTS REPLACED.