What was found
IAD/CLE - FLT 6551 - DURING TAXI-OUT AT 1755 HOURS ON 7-16-97, EXPERIENCED A RT OIL PRESSURE FLUCTUATION, BUT HAD NO CAPTION LIGHT. CREW AND THE AIRCRAFT RETURNED TO THE GATE WHERE MAINTENANCE CONTROL WAS NOTIFIED OF THE DISCREPANCY AND THE MAINTENANCE PERSONNEL DISPATCHED TO THE AIRCRAFT FOR TROUBLESHOOTING. IT WAS DISCOVERED THE OIL PRESSURE TRANSDUCER HAD FAILED. MAINTENANCE REPLACED THE TRANSDUCER AND FUNCTIONALLY CHECKED THE SYSTEM IAW THE MM PROCEDURES. AIRCRAFT WAS THEN RELEASED FOR SERVICE. (X)