As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACRID FUMES EMANATING FROM AIR CONDITIONING SYSTEM WITH NR 1 PACK IN USE WITH EITHER APU OR ENGINE BLEED. INSPECTED AND FOUND RESIDUAL HYDRAULIC FLUID CONTAMINATION IN NR 1 PAC SYS. A FUNCTION OF HYD SYS OIL SERVICING. CLEANED HYD FLUID AND OPERATED NR 1 PAC FOR 3 HRS WITH NO RECURRENCE OF FUMES. NR 1 PAC OPS CHECK GOOD IAW A300 MM 21-00-00.