MM4618, Lesson 1
DD Form 314
The front side of DD Form 314 (Preventive Maintenance Schedule and Record) serves as a record of
scheduled and performed organizational maintenance, lubrication services, and oil samples (Figure 1-8). The
back side of the form is used to record not mission capable (NMC) time at unit and support maintenance. The
back side of the form is also used to record odometer and hour meter changes.
Services are scheduled at least one month or one service in advance, whichever is greater. Completed
services are shown by inking in the appropriate symbol or symbols and the miles or the hours. Projected services
are shown by penciling in the symbol or symbols and the miles or the hours.
The following letters are used to show the type of service scheduled:
Monthly (1 month) service.
Quarterly (3 months) service.
Semiannual (6 months) service.
Annual (1 year) (12 months) service.
18 months service.
Biennial (2 years) service.
Quadrennial (4 years) service.
It may not be possible to pull a service when it is scheduled Therefore, a variance is allowed before or after
the schedule of days, miles, or hours. These variances are as follows:
Ten days before or after the scheduled service.
Ten hours before or after the scheduled service.
One hundred miles or 100 kilometers before or after the scheduled service.
A one-day variance for weekly services.
When a service is pulled within the allowable variance, ink in the appropriate symbol and the miles, kilometers,
or hours on the date it was scheduled. When a service is completed outside the variance, erase the symbol and
the miles, kilometers, or hours on the scheduled data. Ink in the symbol and the miles, kilometers, or hours on
the actual day the service was completed. Schedule the next service from the new date.
Symbols are used in the date blocks on the back side of DD Form 314 to record NMC time. An O represents
not mission capable maintenance (NMCM) at the unit. An S placed inside the 0 represents not mission capable
supply (NMCS) at the unit. An X represents NMCM at the support level. The letter S placed over the X
represents the days the equipment is NMCS at the support level.