As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED, CREW REPORTED A STRONG ODOR TROUGH ACFT CABIN THAT SMELLED LIKE PLASTIC OR CRAYONS DURING THE BOARDING PROCESS WITH APU BLEED AIR ON. THE ACFT WAS DEPLANED AND REMOVED FROM SERVICE. MAINTENANCE FOUND AN OIL LEAK AT THE APU LUBE MODULE AND REPLACED IT IAW AMM 49-91-45. A SATISFACTORY LEAK AND OPS CHECK WAS ACCOMPLISHED ALONG WITH THE DECONTAMINATION TASK CARD 26L00021004 WITH NO ADDITIONAL ODORS NOTED.