What was found
MCI - FLT 406 - DURING FLIGHT, THE NR 1 CSD LOW OIL PRESSURE LIGHT ILLUMINATED INTERMITTENTLY; TEMPERATURE READS APPROXIMATELY 130 DEGREES, AND APPROXIMATELY 40 DEGREES HIGHER THAN NR 2 ENGINE. AIRCRAFT RETURNED TO MCI WITH NO INCIDENT. REPLACED NR 1 CSD PER MM 24-11-11, NR 1 CSD OIL COOLER PER MM 24-11-21, AND NR 1 CSD OIL COOLER FILTER PER MM 24-11-31. (X)