TM 10-6640-215-13 SECTION II.  OPERATOR PREVENTATIVE MAINTENANCE CHECKS AND SERVICES (PMCS) Alphabetical Index Paragraph Title Paragraph Equipment is Not Ready/Available If Column  ....................................................................... 2-5 General  ................................................................................................................................ 2-3 PMCS Procedures ................................................................................................................ 2-4 2-3.  GENERAL The  following  paragraphs  describe  general  information  concerning  when  to  do  PMCS  and  what  to  do  if  a  failure  is discovered. a.    Before You Operate.  Always keep in mind the CAUTIONS and WARNINGS.  Perform your before (B) PMCS prior to the equipment leaving the petroleum laboratory or performing its intended mission. b.    While You Operate.  Always keep in mind the CAUTIONS and WARNINGS.  Perform your during (D) PMCS when the equipment is being used in its intended mission. c.    After You Operate.  Be sure to perform your (A) PMCS after the equipment has been taken out of its mission mode or returned to the petroleum laboratory. d.    If Your Equipment Fails to Operate.  Troubleshoot with proper equipment.  Report any deficiencies using the proper forms.  See DA Pam 738-750 2-4.  PMCS PROCEDURES. The following paragraphs describe your PMCS, Table 2-13. a.    Purpose of PMICS Table.  Your PMCS table lists the inspections and care your equipment requires to keep it in good operating condition. b.    Item Number Column.  Item numbers are assigned in chronological, ascending sequence regardless of interval designation.  These numbers are used for your "TM number" column on DA Form 2404, Equipment Inspection and Maintenance Worksheet in recording results of PMCS. c.     Service Interval Column.  The "Interval" column of your PMCS table tells you when to do certain checks or services. d.    Item  to  be  Inspected  Column.    This  column  lists  functional  groups  and  their  respective  assemblies  and subassemblies.  The appropriate check or service procedure follows the specific item to be inspected. e.    Procedures Column.  This column of your P.MCS table tells you how to do the required checks and services. Carefully  follow  these  instructions.    If  you  do  not  have  the  tools,  or  if  the  procedure  tells  you  to,  have  unit maintenance do the work. 2-30