TM 1-1520-240-BD • Test  Equipment  Kit.    Contains  diagnostic  and  test equipment and adaptors. • Connector Repair Kit.  Contains electrical connector insertion  or  removal  tools,  crimping  tools  and  dies, and wire stripping tools and dies. • Wire Repair Kit.  Contains wire, shield, and co-axial cable cutters, strippers, crimpers and splice materials.    Also  contains  certain  bulk  wire,  shield, and insulation materials, terminal boards, and cable tying    materials.        This    kit    also    contains    certain connector    pins    and    sockets    for    use    with    the connector   repair   kit.      A   heat   gun   is   included   to complete environmentally protected splices. The  fourth  kit  is  for  use  at  the  downed  aircraft  site.    It contains     materials     and     tools     needed     to     perform emergency  repairs  that  will  allow  self  recovery  of  the aircraft.  The emergency repair and aircraft recovery kit is  compact  to  facilitate  transport  to  the  downed  aircraft site. b. Operation. The four kits also contain environmentally protected software as follows: • Instruction  Sheets.    For  the  tools,  repair  materials, and test equipment contained within the kit. • Contents    Chart.        For    inventory    control    of    the components    contained    within    each    kit    storage compartment. • Cross-Reference     Charts.          For     re-ordering     kit components. • Application  Charts.    To  provide  proper  selection  of kit components for a specific task. The information contained in the software is intended for use   during   combat   to   repair   aircraft   wiring   systems without  using  any  other  TM.    Recommended  usage  of the four kits is described in paragraphs 9-7b(1) through 9-7b(4). (1) Test Equipment Kit. (a) Mission    And    Major    Components. The   test   equipment   kit   is   used   for   diagnosing   and troubleshooting damaged aircraft wiring systems and for verifying   wiring   repair.      The   kit   contains   electronic instruments     for     conducting     necessary     test.          The instruments and their intended use are: • Digital   Multimeter   (DMM).      A   digit   multimeter   is provided for measurement of circuit voltages (AC to 1000  VAC,  DC  to  1500  VDC);  current  (up  to  10 amps);  and  resistance  (0  to  20  ohm).    An  "instant- on"  continuity  indicator  is  provided.    The  DMM  is waterproof and built for use in hostile environments. • Time    Domain    Reflectometer    (TDR).    A  TDR  is provided   to   locate   and   analyze   faults   in   coaxial cables.    The  TDR  provides  a  CRT  display  of  the cable  condition.    The  display  indicates  the  type  of fault    present    (short,    open,    crimped,    frayed,    or crushed)   and   the   distance   of   the   fault   (in   0.1   ft. increments) from a reference point at the TDR input. The  TDR  also  provides  a  chart  recorder  which  is used   to   make   a   permanent   record   of   a   repaired cable's  TDR  signature  for  inclusion  in  the  aircraft records.  The TDR may also be used to test twisted wires. CAUTION • The TDR battery pack will discharge    if    left    in    the    TDR during extended storage. Remove the battery pack from the TDR   and   place   in   compartment number   16   (spare)   of   the   test equipment kit case during storage periods. • The     test     equipment     kit     also contains  test  leads  and  adaptors to allow connection of the TDR or DMM     to     the     wires     or     cable undergoing repair. Other support    equipment    such    as    a flashlight, illuminated magnifying glass,  spare  D-Cell,  AAA,  and  9- Volt  batteries,  and  rolls  or  TDR chart recorder paper are provided. (b) Use.    Prior  to  using  kit  contents,  a good working knowledge of the test equipment operating procedures   and   adaptor   selection   is   required.      The software package duplicates the environmentally protected    software    within    the    kit    and    provides    the operating   instructions   forth   TDR   and   DMM.      It   also contains   adaptor   selection   charts   for   connecting   the TDR and DMM to co-axial cable connectors, connector pins   and   sockets,   bare   wires,   and   terminal   boards. Proficiency in the use and 9-3