As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LAV SMOKE ON EICAS. CABIN SMOKE DETECTED ON CLIMBOUT. PULLED CB'S E11, E12. MX REMOVED LAV MIRROR TO CHECK FOR BURNING INDICATIONS. NO BURNING INDICATIONS NOTED, RE-INSTALLED LAV MIRROR AND CONTINUED TO LOOK FOR ANY SIGNS OF BURNING NO INDICATIONS NOTED. A/C WAS APPROVED FOR RETURN TO SERVICE.