ARMY  TM  9-2815-254-24P AIR FORCE TO 38G1-94-4 7 ABBREVIATIONS   (abbreviations   must   be   applicable   to   specific   rpstl   and   not   listed   in   mil-std-12) Abbreviations Explanation AVIM Aviation   Intermediate Maintenance AVUM Aviation    Unit    Maintenance BOI Basis   of   Issue DS Direct    Support G S General    Support MAC Maintenance    Allocation Chart NIIN National   Item ldentification   Number (consists   of   the   last 9-digits  of  the  NSN) NSN RPSTL Repair   Parts   and Special  Tools  List SMR SRA TMDE National   Stock   Number Source,   Maintenance   and Recoverability    Codes Specialized    Repair    Activity Test,    Measurement    and Diagnostic    Equipment Usable   on   Code 11/12   blank)