What was found
FLT 6504 - IAD-LGA - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO RIGHT OIL CONTAMINATION WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED, CLEANED AND REINSTALLED CHIP DETECTOR. MAINTENANCE REMOVED AND REPLACED RIGHT ENGINE ON 10-09-98 DUE TO BAD OIL SAMPLE RESULTS, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)