As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPLEMENTAL AFTER LANDING AND STARTING APU STRONG OIL SMELL IN COCKPIT AND CABIN/BOTH ENGINES STILL RUNNING SMELL DISAPATED WHEN ENGINS SHUT OFF/ NO EICAS INDICATIONS.-C/A-PERFORMED FIM TASK 21-20-00-810-801 FOUND RESIDUAL DEICE FLUID IN APU COMPARTMENT. REMOVED CONTAMINATION. RAN BOTH APU & ENGINES WITH CREW. NO ODORS NOTED. AC OK FOR SERVICE.