As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID OILY SMELL IN COCKPIT. VARYING CONCENTRATIONS WITH POWER SETTINGS. NO SMELL IN CABIN. SMELL DETECTED BY ALL THREE CREW MEMBERS. REMOVED APU BLEED VALVE AND DUCT, NO DEFECTS NOTED. REINSTALLED APU BLEED VALVE AND DUCT AND PERFORMED ENGINE RUNS, NO ODORS NOTED. COULD NOT DUPLICATE.