maintenance  history  for  each  vehicle.  The  PM/cost control  clerk(s)  controls  EROs,  maintains  the  ERO Log (fig. 1-15), the equipment history jackets, and the maintenance    office     Equipment     Status     Boards. Additionally, the PM/cost control clerk(s) summarizes the  total  repair  cost,  labor   expended,   and   makes entries  on  the  ERO.  The  dispatcher  communicates with  the  PM/cost  control  clerk  when  updating  the Equipment  Status  Boards  and  the  equipment  PM schedule. An  equipment  history  jacket  is  maintained  for each   USN-numbered   item   of   CESE.   The   jacket contains     pertinent     descriptive     data     and     the maintenance  history  for  the  vehicle.  The  descriptive data includes the appropriate DOD  Property Record, DD     Form     1342     (fig.     1-16),     and     Equipment         ERO                 USN           TYPE ERO       DATE IN DATE OUT NUMBER    CODE      NUMBER    REMARKS         INT   A   B     C      AA00 0001           252021   25-01286      X        11/2/2             11/8/2     AA00 0002           030701       97-23465         X           11/2/2             11/2/2 —   — —   — —    —   — —    — — —   — —   — —    —   — —    — — —   — —   — —    —   — —    — —    AA00 0013            485011       48-00123   X             X       11/28/2            12/12/2 D/L  12/1/2 ERO NUMBER - Eight-digit number. The first four digits of the ERO number will be two Alpha characters and two numeric such   as AA00. The second group will be all numeric and will   run continuously from 0001 through  9999 with no regard   to end of fiscal year. CODE -   Self -explanatory. (Six Digit) USN NUMBER -   Self explanatory. TYPE ERO - Type maintenance performed: interim repair A, B, or C-PM. DATE IN (SHOP) - Date ERO forwarded to inspector. DATE OUT (SHOP)   - Date ERO returned. Work completed. REMARKS - Date deadlined etc. Figure 1-15.—Equipment Repair Order Log Sheet. 1-20