What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) "Lav-smoke" indication on eicas while taxxing to runway. Pilot asked flight attendant if she could smell smoke in cabin. She answered yes. Pilot asked flight attendant to check lav for smoke. None found. Aircraft emergency declared. Aircraft shut down and passengers deplaned via stairs and bussed to terminal. No evidence of fire discovered, aircraft towed to terminal to be checked by maintenance. Visual inspection revealed lav fire extinguisher and fusible plug still intact. No discharge noted from extinguisher. Operational checked performed on lav smoke detector. Ops check ok.
As the FAA filed it
(-23) "LAV-SMOKE" INDICATION ON EICAS WHILE TAXXING TO RUNWAY. PILOT ASKED FLIGHT ATTENDANT IF SHE COULD SMELL SMOKE IN CABIN. SHE ANSWERED YES. PILOT ASKED FLIGHT ATTENDANT TO CHECK LAV FOR SMOKE. NONE FOUND. AIRCRAFT EMERGENCY DECLARED. AIRCRAFT SHUT DOWN AND PASSENGERS DEPLANED VIA STAIRS AND BUSSED TO TERMINAL. NO EVIDENCE OF FIRE DISCOVERED, AIRCRAFT TOWED TO TERMINAL TO BE CHECKED BY MAINTENANCE. VISUAL INSPECTION REVEALED LAV FIRE EXTINGUISHER AND FUSIBLE PLUG STILL INTACT. NO DISCHARGE NOTED FROM EXTINGUISHER. OPERATIONAL CHECKED PERFORMED ON LAV SMOKE DETECTOR. OPS CHECK OK.