As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 1543 - DURING CLIMB-OUT OF CLT, BOTH LAVATORY SMOKE DETECTORS ACTIVATED IN AIRCRAFT. CAPTAIN DECLARED EMERGENCY AND RETURNED TO FIELD IN CLT. FLIGHT LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND THE RT PACK OIL QUANTITY OVERSERVICED AND WATER SEPARATOR CONTAMINATED WITH OIL. MAINTENANCE REPLACED WATER SEPARATOR BAG AND DRAINED OIL TO PROPER LEVEL. RAN PACK. NO SMOKE NOTED FROM PACK. (X)