TM 1-1510-224-10 and flag assemblies are installed. 9. Slide payload module assembly into dispenser  assembly  and  secure  two  stud bolts, using 5/32-inch hexagonal wrench. b. Ammunition Unloading Procedure. WARNING All   aircraft   power   to   the   dispenser system   must   be   turned   off   prior   to removal    of    payload    module    from dispenser  assembly.    Safety  pin  flag shall be installed on the right equipment  rack  prior  to  landing  and the  safety  pin  flag  shall  be  installed in   the   wing-mounted   safety   switch immediately after landing. 1. MFD Bring up  ASE  page  and  depress  L3 to change dispenser to SAFE. 2. Assure  safety  pin  and  flag  are  inserted  in right equipment rack and in wing mounted safety switch. WARNING If there is an indication that a misfire occurred, notify emergency ordnance disposal    personnel    for    disposition and disposal. 3. Remove  module  from  dispenser  assembly by    unscrewing    two    stud    bolts    with    a 5/32inch     hexagonal     wrench     and     slide dispenser assembly out. 4. Remove     retaining     plate     from     payload module by unscrewing two retaining bolts. 5. Remove expended and unexpended impulse   cartridges   and   flares   (or   chaff) from payload module. 6. Repack    unexpended     items     in     original containers and return to stores. NOTE Cracking  of  the  chaff  cartridge  case upon firing is not unusual.  This does not   effect   performance   of   the   item and   should   not   be   reported   as   a malfunction. 4-5. RADAR   SIGNAL   DETECTING   SET   (AN/   APR- 39(V)1). CAUTION To   prevent   damage   to   the   receiver detector    crystals,    assure    that    the AN/APR-39(V)l  antennas  are  at  least 60  meters  from  active  ground  radar antennas   or   6   meters   from   active airborne   radar   antennas.      Allow   an extra   margin   for   new,   unusual,   or high power antennas. The  radar  signal  detecting  set  indicates  the  relative position   of   search   radar   stations.      The   radar   signal detecting set is controlled through the aircraft survivability equipment/ avionics control system (ASE/ACS).    Audio  warning  signals  are  applied  to  the pilot's and copilot's headsets.  The radar signal detecting set    is    protected    by    the    7.5-ampere    circuit    breaker placarded  APR39,  located  on  the  mission  control  panel (fig.  4-1).  The associated antennas are shown in figure 2-1.    For  operating  instructions,  refer  to  TM  11-5841- 283-20. 4-6. RADAR   SIGNAL   DETECTING   SET   (AN/   APR- 39(V)2). CAUTION To   prevent   damage   to   the   receiver detector    crystals,    assure    that    the AN/APR-39(V)2  antennas  are  at  least 60  meters  from  active  ground  radar antennas   or   6   meters   from   active airborne   radar   antennas.      Allow   an extra   margin   for   new,   unusual,   or high power antennas. The  radar  signal  detecting  set  indicates  the  relative position   of   search   radar   emitters.      Through   graphic symbology,  the  type  of  tracking  radar  emitters  may  be identified.    Unknown  emitter  origins  are  also  depicted. Audio   warning   signals   are   applied   to   the   pilot's   and copilot's   headsets.      The   radar   signal   detecting   set   is controlled through the aircraft survivability equipment/avionics   control   system   (ASE/   ACS).      The radar signal detecting set is protected by the 7.5-ampere circuit breaker placarded APR39, located on the mission control  panel  (fig.    4-1).    The  associated  antennas  are shown    in    figure    2-1    or    2-2.        Complete    operating instructions   are   to   be   obtained   from   the   appropriate manuals. 4-7. DATA TRANSFER SYSTEM. The  data  transfer  system  allows  the  crew  to  retrieve mission  data  from  the  programmable  cartridge  and  to store mission data back to the programmable cartridge. 4-10