As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UPON LANDING AND AFTER APU START THERE WAS AN UNUSUAL ODOR NOTICED BY THE ENTIRE CREW. IT WAS AT THE FRONT AND AFT OF THE AIRCRAFT. DIFFERENT THAN A FUEL SMELL AND CAME ON EVERY TIME THE APU BLEED WAS CYCLED. (OPEN).