As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A HAZE AND STRONG CHEMICAL ODOR WERE PRESENT IN THE CABIN WITH APU BLEED ON. CREW MEMBER REPORTED BURNING EYES AND THROAT IRRITATION. ODOR DISSIPATED WITH APU BLEED AIR OFF. MAINTENANCE REMOVED AND REPLACED THE APU. HONEYWELL CONFIRMED THE FAILURE OF THE LOAD COMPRESSOR SEAL.