As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG ACRID ODOR NOTED IN COCKPIT AND AFT CABIN DURING CLIMB. *S/D* MAINTENANCE FOUND THE APU COOLING FAN LEAKING OIL. REMOVED AND REPLACED APU. SHOP COULD NOT DUPLICATE COOLING FAN LEAK. APU OPERATED NORMALLY WITH NO EXTERNAL LEAKS. SUSPECT GLYCOL INGESTION DURING DE-ICING PROCEDURE.