As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON NR 2 ENG START USING GPU, FAINT BURNING RUBBER ODOR IN FLIGHT DECK. DISSIPATED ON TAKE OFF. FOUND ENG 1 SLIGHTLY OVERSERVICED. DRAINED OIL TO CORRECT LEVEL (772883) PREFORMED LEVEL A AND B DECONTAMINATION PER W/C 2100-2007. (LP 7694402 - AIRCRAFT WAS GROUNDED)