As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 5 MINUTES AFTER TAKEOFF, NOTICED PRESSURIZATION BUMPS ON CLIMBOUT FOLLOWED BY LIGHT SMOKE AND ODOR IN COCKPIT. RETURNED TO ILN. INSPECTED AFT ACCESSORY COMPARTMENT DUCT WORK AND FLUID LINES. FOUND NO VISIBLE DAMAGE OR FLUID LEAKS AND FOUND NO EVIDENCE OF FLUID RESIDUE IN DUCT WORK AROUND EITHER HEAT EXCHANGER. RAN ENGINES FOR APPROXIMATELY 2 HOURS AT VARIOUS THROTTLE SETTINGS BETWEEN 1.65 AND 1.9 EPR.