As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS COMPLAIN OF STRONG SMELL LIKE CRAYONS NEAR EXIT ROW SEEMS TO HAVE BEGAN DURING DESCENT CRAYON SMELL WAS LIKE HOT CRAYON OR MELTING WAX. MAINTENANCE ACCOMPLISHED APU SMOKE ODOR FUMES TROUBLESHOOTING TASK CARD 26L00021002 AND FOUND EVIDENCE OF OIL LEAKS. MAINTENANCE ACCOMPLISHED ENHANCED DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014.