As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK INFLIGHT T2275/02MAY LGA TO BNA - CREW REPORTED SMOKE IN CABIN AND COCKPIT. DIVERTED TO JFK AND LANDED WITHOUT INCIDENT. AIRCRAFT TAKEN OUT OF SERVICE FOR EVALUATION AND REPAIR. FOUND AUXILLIARY POWER UNIT (APU) LEAKING OIL. REPLACED APU ON 04 MAY AT JFK. SYSTEM GROUND CHECKED NORMAL OPERATION.