As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: OILY SMELL STRONGEST IN THE COCKPIT BUT ALSO IN CABIN DURING CLIMB AND DESCENT WITH POWER CHANGES DISSIPATES AT CURSE WITHOUT CREW ACTION APU OFF AND ENGINE BLEEDS ON. C/W JOB CARD 26L00021001 AND 26L00021002. FOUND APU OIL COOLER AT FAULT. REMOVED AND REPLACED APU OIL COOLER IAW AMM 46-52-51. NO ODOR PRESENT.