TM 5-4220-231-14&P Section    II.  PREVENTIVE MAINTENANCE CHECKS AND  SERVICES  (PMCS) Page 2-2 Introduction .......................................................... 2.13 Table 2-1 Operator Preventive Maintenance Checks and    Services for   Diving Operations .................................................. 2-16 Table 2-2 Operator Preventive Maintenance Checks and    Services for  Chamber Operations .................................................. 2-29 2-2 Introduction. a. General. Maintenance that    is   properly performed will  reduce equipment failures and    ensure continued satisfactory performance of   the    SDASS. These preventive maintenance requirements are performed on    a scheduled or  situation-related basis    to  maintain equipment in a  fully  operable condition within   design specifications. Tables 2-1   and   2-2   (PMCS Tables) have    been    provided so   you   can   keep   the   SDASS in  good   operating condition and   ready    for  dive   or   chamber operations. b. Warnings and    Cautions. Always observe the   WARNINGS and    CAUTIONS appearing in   PMCS    Tabws. WARNINGS and   CAUTIONS appear before    applicable procedures. These must    be   observed to   prevent serious personnel injury,   to  prevent equipment damage, or  to   prevent SDASS system failure. c. Explanation of  table    entries. (1) Item   Number column. Numbers in  this   column are    for  reference. When    completing dw Equipment Inspection and Maintenance Worksheet (DA   Form 2404), include the    ftm number    for  the   check/service indicating a  fault. Item  numbers also   appear in the   order    that you   must    do  checks and   services for  the   intervals listed. (2) Interval column. This   column tells   you   when    you   must    follow   the   procedure in  the   procedure column. Intervals shall be   represented by  the    following initials: B  -  Before    operation, D During   operation; A  -  After   operation; W  -  Weekly. (3) Item    to   be Inspected/Procedure column. This column provides the location, ftem   to   tie checked or  secured, and   the   procedure to  check or  service the   SDASS to  ensure it  is  reach for  operation. You   must follow   the    procedure at  the   time   stated in  the   interval column (4) Equipment Is   Not   Ready/Available If:  column. Information in  this column indicates what faults will keep    your    equipment from   being    capable of  performing its  primary mission. If your PMCS results reveal faults listed in   this    column, do    not   operate the    equipment Follow standard operating procedures for   reporting equipment failure. d. Other    table entries. Be   sure    to   observe all  special information and    notes that   appear in  your   table. 2-13