As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT DURING CLIMB THEY RECEIVED A LAVATORY SMOKE INDICATION DURING FLIGHT & A FOUL SMELL WAS PRESENT IN THE AFT PORTION OF THE ACFT. NO VISIBLE SMOKE WAS PRESENT.. THE MESSAGE CLEARED ON ITS OWN. THE ACFT RETURNED TO FIELD & LANDED WITHOUT FURTHER INCIDENT. PERFORMED THE ASSOCIATED FAULT ISOLATION MANUAL TASK WITH NO ODORS OR DEFECTS NOTED. THE ACFT WAS FOUND SAFE FOR FERRY FLIGHT TO KSDF FOR FURTHER TROUBLESHOOTING. THERE WERE NO INCIDENTS DURING THE FERRY FLIGHT, REPLACED THE NR 2 ENG. OPERATIONS CHECKED GOOD WITH NO FURTHER DEFECTS NOTED.