As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW RECEIVED LAV SMOKE ECAM WARNING FOR ABOUT 60 SEC. DETERMINED IT WAS TRIGGERED BY HAIRSPRAY IN LAV 4R AND LINT BUILD-UP IN DETECTOR. REPLACED 4R LAV DETECTOR AIR FILTER AND ACCOMPLISHED A SATISFACTORY OPS CHECK IAW AMM 26-17-00-710-802A.