TM10-5411-201-24P T035E4-178-4 USAF - Intermediate (*) USA - General Support (*) USN - Ashore USMC - Fourth Echelon (*)  NOTE:  For  USAF  programs  and  the USA  Safeguard  Program.  Code  F  will  be used to denote intermediate maintenance. On joint programs, use of either Code F or H by   the   joining   Service   will   denote intermediate  level  of  USAF  and  the  USA Safeguard Program. D Reparable  item.  When  beyond lower  level  repair  capability, return to depot. Condemnation and   disposal   not   authorized below depot level. L Reparable   item. Repair, condemnation  and  disposal  not authorized below   depot, Specialized   Repair   Activity level. A Item  requires  special  handling or  condemnation  procedure because of specific reasons (i.e., precious   metal   content,   high- dollar value, critical material or hazardous  material).  Refer  to appropriate  manuals  directives for specific instructions. c.   (USMC)   Special Stock  age Indicator  Code  and  Replacement  Factor (Column 3). (1)  Special  Stockage  Indicator  Code. This  column  reflects  the  condition  under which  certain  maintenance arts  (parts assigned NSN’S and ended in t e “P” series source code of the SMR code), are stocked. The codes are explained as follows: No  Code  Indicates  that  the  part  may  or may not be authorized in initial allowances to using or supporting   organizations.   The manner  of  determining  initial allowances   is   explained   in paragraph (2) below. I A plied to maintenance parts for which    predicted  consumption would  not  warrant  inclusion  in Mount-  Out  but,  for  which  a quantity of one (1) is authorized as  insurance  for  Mount-Out using a 360 day This criteria is based   on   the   total   density   of equipments   employed   by   the DIV/WING  TEAM.  Mount-Out allowances,  so  authorized,  will be  stocked  by  the  FSR  or  the MWSG  in  the  case  of  Marine Wing   peculiar   equipment,   as applicable. D Applied   to   maintenance   parts that  are  not  considered  critical or  essential  to  be  on  hand  and are, therefore, not authorized in initial   allowances;   however, these  items  are  stocked  within the Supply System and may be requisitioned based upon usage. T Indicates   that   the   part   is authorized in garrison operating allowances  in  order  to  comply with   state   and   local   laws; however, the part is not autho- rized in Mount-Out since it is not combat  essential. (2) Replacement  Factor.   This   column reflects the replacement factor assigned to each   nationally stock   numbered maintenance  repair  part.  This  factor  is assigned  to  the  repair  part  on  its  first appearance   in   the   publication.   The replacement factor, expressed as a decimal, indicates the average rate at which the type of item so coded has been used by Marine Corps field units or the rate at which design engineers anticipate the item will fail, wear out, or otherwise require replacement. All computations are based on a replacement period   of   one   year. Therefore,  a replacement  factor  of  0.08,  applied  to  an item in this stock list, indicates that eight out of every one hundred of such items used in the end item of equipment to which this 5