As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT WITH EXTERNAL AIR CONNECTED, THERE APPEARED AN OILY SMOKE ODOR ENTERED THE COCKPIT. NR 1 PACK TEMP CLIMBED TO 182 FACT. R & R NR 1 PACK COALESCER BAG REF AMM 21-54-05-2. OPERATED NR 1 PACK AND NO OIL ODOR FOUND REF AMM 21-53-20-5. LEAK/OPS CHECKED GOOD.