The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1mm. Which of the following conditions is indicated and what steps should be taken, if any? Illustration MO-0121

Correct Answer: Option B — No appreciable wear has occurred, and the proper maintenance procedures should continue to be followed.

Thrust bearing measurements showing i1 at 4 mm and i2 at 1 mm after eight years reflect normal operating wear progression within acceptable classification society tolerances, indicating that established lubrication and operational maintenance procedures should continue unchanged.