As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB - RIGHT AFT LAV SMOKE ALARM SOUNDED SHORTLY AFTER TAKEOFF F/A REPORTED MUSTY SMELL AND FAINT HAZE IN AFT CABIN FAINT SMELL WAS ALSO PRESENT IN COCKPIT. RAN A/C DUCT BURNOUT PER M/M AND REPLACED BOTH WATER SEPARATOR BAGS. RAN ENG CHECKS GOOD.