As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING CLIMB BLEEDS ON APU OFF ENGINE ON CABIN CREW MEMBERS REPORTED A STRONG STRANGE ODOR PASSENGERS REPORTED SMELLING IT AS WELL. REMOVED AND REPLACED AIRCRAFT AIRCRAFT HEPA RECIRCULATION FILTERS PER AMM 21-25-01-401. RAN ENGINES TO FULL POWER WITH NO ADVERSE ODORS.