As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: MELTED WAX OR BURNED WAX SMELL EXPERIENCED IN CABIN AND FLIGHT DECK APPROXIMATELY 10 MINUTES AFTER TAKEOFF. SMELL PERSISTED THROUGHOUT THE CABIN AND SLOWLY DISSIPATED OVER THE NEXT 30 MINUTES. **SUPPLEMENTAL REPORT FOR AALA202306225611: MAINTENANCE DETERMINED THE APU WAS THE SOURCE OF THE ODOR AND REPLACED IT PER TASK CARD 26L31049003. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED. ** (CLOSED)