As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6290 - IAD-DAY - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING AT IAD DUE TO LEFT OIL CONTAMINATION LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLAECD LEFT ENGINE, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)