As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OILY BURNING SMELL COMING THRU PACK SYS WITH TAKEOFF THRUST & CLIMB THRUST SET. SEEMED TO GET WORSE IN THE DESCENT WITH LOW THRUST SETTINGS. NO VISIBLE SMOKE. SUSPECT PACK NR 1 SYS. TRANSFERRED TO NRWC 650-DFW-01912. IAW NRWC 650-DFW-01917, COMPLIED WITH. R & R E1 NR 0 CARBON SEAL. ENG RUN PERFORMED FOR ODOR CONFIRMATION, NO SMELL NOTED IAW ETN-EM-72-034.