As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4100 THE CREW REPORTED A LAVATORY SMOKE WARNING ON INITIAL CLIMBOUT AND COCKPIT FUMES PRESISITED WITH ELECTRICAL SMELL IN FORWARD CABIN. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NUMBER 1 LEFT HAND ENGINE AND OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.