TM 55-1500-342-23 4-8.    DD  Form  365-3  (Chart  C-  Basic  Weight  and Balance Record). a.    The  CHART  C  is  a  continuous  and  permanent history  of  the  aircraft  weight,  moment/index  and  center of   gravity   position.      All   permanent   changes   to   the aircraft  basic  weight  and  moment,  regardless  of  size, shall be recorded (typed or clearly written in ink) on the CHART  C  to  keep  it  correct  and  up-to-date.    The  last basic  aircraft  weight,  moment,  and  c.g.    or  index  shall be considered the most current data and the baseline for all subsequently dated aircraft loading calculations. b.    At  the  time  of  delivery  of  a  new  aircraft,  the manufacturer  enters  the  aircraft  basic  weight,  moment, and c.g.  or index on the CHART C.  The itemized list of the  equipment  which  is  included  in  the  aircraft  basic weight is shown in the first IN AIRCRAFT column under the RECORD OF CHECKING section of the CHART A. c.    Additions and/or subtractions to the basic weight and  moment/index  on  CHART  C  will  be  accomplished as follows: (1) Whenever    equipment    is    added    to    or removed  from  the  aircraft,  an  entry  must  be  made  on this  chart.    If  the  item  is  listed  on  the  CHART  A,  enter the  identical  item  number,  description  and  applicable weight, arm, and moment data on the CHART C.  If the item is not listed on the CHART A, determine its weight and arm by actual measurement or obtain this data from the applicable MWO and record it, and the moment, on both the CHART C and CHART A.  Any change which is caused by a specific MWO will carry a reference to the MWO   number.      Do   not   enter   check   marks   on   the CHART  A  for  these  items  until  a  complete  inventory  is made. (2) Subsystem     modifications     or     structural changes shall be recorded in the same manner with the change  in  weight  and  moment  added  to  or  subtracted from  the  current  total.    Whenever  such  changes  are provisions   for   equipment   such   as   structural   mounts, electrical wiring, or air conditioning, they will be listed as separate line items. (3) Whenever  a  CHART  A  inventory  reveals equipment changes, subsystem modifications, or structural  changes  not  already  recorded  in  the  CHART C, the change in weight and moment shall be posted as required    in    the    preceding    paragraphs.        The    newly calculated basic weight, moment and  index  shall  be  dated  to  agree  with  the  inventory date entered on the CHART A. (4) Whenever    an    aircraft    is    weighed,    the CHART  C  will  be  updated  to:  (1)  reflect  any  changes resulting from the CHART A inventory and (2) show the new basic weight, simplified moment, and index or c.g. from   the   FORM   B   AIRCRAFT   WEIGHING   RECORD (DD  Form  365-2).    The  date  entered  on  the  CHART  C shall   agree   with   the   inventory   date   entered   on   the CHART A and the weighing date entered on FORM B. d.    Whenever    the    CHART    C    basic    weight    is changed by ±  3/10 of 1% and/or basic C.G.  is changed by  ±   0.3   inches,   a   new   FORM   F   which   reflects   this change,    must    be    prepared.        The    requirement    for originating   new   FORM   F's   when   aircraft   equipment, which  is  part  of  the  aircraft  basic  weight,  is  temporarily added to, removed from, or relocated within the aircraft because of maintenance, specific mission requirements, etc., may be eliminated by making the following entries on the Aircraft Inspection and Maintenance Record (DA Form 2408-13-112408-13-1-E). (1) In block 16 enter a Red Diagonal (/). (2) In   block   17   enter   a   description   of   the aircraft    equipment    temporarily    added,    removed,    or relocated.  The resulting increase or decrease in aircraft weight and moment will be included in this entry.  This entry    shall    conclude    with    the    following    statement: "CHANGE NOT ENTERED ON CHART C." (3) Continue  to  perpetuate  the  entry  on  DD Form   2408-13   or   transfer   to   the   Uncorrected   Fault Record  (DA  Form  2408-14)  in  accordance  with  current technical manual procedures until the aircraft is returned to the previous configuration or the CHART C is updated to reflect the change. (4) Temporary  changes  in  basic  weight  may be reflected on DA Form 2408-13-1/2408-13-1-E or DA Form  2408-14/2408-14-E  for  a  period  not-to-exceed  90 days.    If  not  accomplished  sooner,  the  DD  Form  365-3 will  be  updated  to  reflect  the  temporary  change  at  the expiration of this 90 day period. Change 8  4-10