As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING OIL SMELL THROUGHOUT FLIGHT DECK AND CABIN WHEN APU IS ON. FACT 07DEC24 21:58 PHL RAN BOTH PACKS ON APU BLD AND ENGINE BLDS 1 AND 2 INDEPENDENTLY NO ABNORMAL SMELLS NOTED DURING TEST PACKS FUNCTION AS INTENDED OK FOR SERVICE AT THIS TIME