As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 679 - AFTER TAKEOFF, CREW REPORTED SMOKE IN THE CABIN. RETURNED AND LANDED JFK WITHOUT FURTHER INCIDENT. REPAIRED HYDRAULIC LEAK AT PRIORITY VALVE UNION. SYSTEM GROUND CHECK NORMAL OPERATION. PERFORMED PACK BURNOUT AND REPLACED COALESCER BAGS. REPLACED ALL THREE SMOKE DETECTORS AS A PRECAUTION. (M)