Figure 2-6. - PM Record Card, NAVFAC 11240 /6 (back).

repairs shall be accomplished to ensure safe and serviceable equipment. Intermediate maintenance requires a higher degree of skill than organiza- tional maintenance, a larger assortment of repair parts, more precision tools, and more complex testing equipment. Prior approval is required by COMCBPAC, COMCBLANT, or CESO before purchasing expensive parts or components for any CESE requiring extensive repairs or numer- ous assembly rebuilds. For further guidance see COMCBPAC/COMCBLANTINST 11200.1 series, section 2, paragraph 3201.

DEPOT MAINTENANCE

The third level of maintenance is depot maintenance. This is performed on equipment that requires major overhaul or restoration to the degree necessary to restore the unit to a like-new condition. This level of maintenance is not normally performed by field units, NMCBs, ACBs, and the like. Depot maintenance is performed by designated overhaul facilities, such as construction equipment departments located at CBC Port Hueneme, California, CBC Gulfport, Mississippi, and CBC Davisville, Rhode Island.

SCHEDULING MAINTENANCE

The standard interval between preventive maintenance service inspections for NCF CESE is 40 working days. This interval is established initially by grouping all assigned CESE into 40 separate PM groups. The CESE is distributed evenly among the PM groups so that only the minimum number of similar units is out of service at any one time.

It is the responsibility of the maintenance supervisor to determine whether the PM interval for any unit of CESE should be reduced. To maintain reliability,=increased working tempo demands increased preventive maintenance.

The maintenance supervisor may decrease the interval by assigning specific CESE to more than one PM group or reducing the total number of PM groups. The maintenance supervisor is not authorized to extend the standard interval between PM service inspections beyond 40 working days.

To establish a deployment schedule of PM due dates, the maintenance supervisor records the working days of the month consecutively beside the PM group numbers. See the sample schedule, figure 2-7.