Corrective Maintenance

DOE-STD-1052-93

Define and explain the following differences between corrective and preventive

maintenance.

a. CORRECTIVE MAINTENANCE

The repair or restoration of equipment that has a failure or is

malfunctioning and not performing its intended function.

Corrective maintenance should normally be performed only on equipment

previously selected to run until failure.

As a result of an effective maintenance program, only a small fraction of

corrective maintenance should be needed on equipment that is important

to safe and reliable system operations.

Some examples of corrective maintenance include:

replacement of a failed electrical breaker

weld repair of a cracked process line, and

repair of a failed instrument transmitter.

b. PREVENTIVE MAINTENANCE

Periodic preventive maintenance is defined as actions taken on a fixed

time interval.

Examples of periodic maintenance include: daily filter changes,

weekly lubrications, or monthly calibrations.

Predictive maintenance results from trending and monitoring equipment

performance parameters (i.e., vibration, oil, and infrared analysis on

operating equipment) and initiating specific planned maintenance prior to

equipment failure.

An example of predictive maintenance would be a pump bearing

replacement, after wear-out was indicated as a result of an oil

analysis.

Discuss with the trainees the corrective and preventive maintenance forms.

Emphasize a clear understanding of each.

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