CORRECTIVE MAINTENANCE TYPES

Corrective maintenance may be classified into five major categories these are: fail-repair, salvage, rebuild, overhaul, and servicing. These categories are described below.

1.  Fail-repair: The failed item is restored to its operational state.

2.  Salvage: This element of corrective maintenance is concerned with disposal of non-repairable material and use of salvaged material from non-repairable equipment/item in the repair, overhaul, or rebuild programs.

3.  Rebuild: This is concerned with restoring an item to a standard as close as possible to original state in performance, life expectancy, and appearance. This is achieved through complete disassembly, examination of all components, repair and replacement of worn/unserviceable parts as per original specifications and manufacturing tolerances, and reassembly and testing to original production guidelines.

4.  Overhaul: Restoring an item to its total serviceable state as per maintenance serviceability standards, using the “inspect and repair only as appropriate” approach.

5.  Servicing: Servicing may be needed because of the corrective maintenance action, for example, engine repair can lead to crankcase refill, welding on, etc. Another example could be that the replacement of an air bottle may require system recharging.