As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BURNING OIL & HUMID SMELL DURING CLIMB OUT. SMELL WENT AWAY WITH PACK 1 OFF. DESCRIPTION OF ODOR/FUMES: PERSISTENT, OIL/OIL BURNING SMELL. APPARENT CABIN SOURCE: CABIN AIR SUPPLY VENTS. FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.-PERFORMED BSI OF LPC & HPC FOUND OIL WETTING ON HPC 1 AND OIL STAINING ON HPC 2 & 3. REF AMM 72-31-00 & 72-36-00. SEE LG PG 3074976 ITEM # 1 ENG 1 BSI FOR CONTAMINATION.