As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO RAMP DUE TO SMOKE IN CABIN. FOUND HYD LINE B-NUT LOOSE AND LEAKING AT LT THRUST REVERSER CONT VALVE. TIGHTENED LINE AND LEAK CHECKS GOOD. REPLACED RT AND LT COALESCER BAGS. LEAK CHECKS OK. PERFORMED OP 5089 DUCT BURNOUT. CHECKS OK.