As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ODOR DETECTED IN INTERIOR OF AIRCRAFT. ACCOMPLISHED JOB CARDS 26L00021001 AND 26L00021002. ODOR APPEARS TO BE COMING FROM AUXILARY POWER UNIT. AIRCRAFT WAS GROUNDED. REMOVED AND REPLACED APU OIL COOLING FAN IAW AMM 49-52-51 AND ACCOMPLISHED APU WASH IAW AMM 49-00-00-100-001-A. OPS CHECKED GOOD.