As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL- FLIGHT 3885, FLIGHT ATTENDANT DETECTED SMOKE IN CABIN ON CLIMBOUT. NO SMOKE OR HAZE NOTED BY CAPTAIN, ONLY ACRID SMELL. MAINTENANCE INSPECTED LIGHTING AND ELECTRICAL EQUIPMENT. AIRCRAFT RUN UP WITH CREW, NOTHING NOTED FROM BLEED SYSTEM OR CABIN ELECTRICAL SYSTEM. AIRCRAFT RETURNED TO SERVICE.