As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: LAV SMOKE DETECTOR WENT OFF AND CABIN FILLED WITH A LIGHT HAZE. SMOKE DISCAPATED AS WE HEADED TO THE GATE. UPON ENGINE #2 INSPECTION MAINTENANCE FOUND UPPER OUTBOARD THRUST REVERSER ACTUATOR LEAKING AND SUSPECTED IT AS SOURCE FOR ODORS. (OPEN)