As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. DURING CLIMB AC FUMES IN COCKPIT & CABIN. PUT PACKS IN HIGH & IT CLEARED OUT, LT PACKS IN HIGH FOR THE REST OF THE TRIP, BACK DURING DESCENT. REPLACED APU IAW 26L31049005. ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.