TM  55-1510-221-10 or  a  radar  warning  signal  has  been  received,  and announce   that   flares   or   chaff   have   been   fired. 4-4.  SYSTEM  DAILY  PREFLIGHT/RE-ARM  TEST. The  following  test  procedures  shall  be  conducted prior  to  the  first  flight  of  each  day  and  prior  to  each re-arming  of  the  dispensers.  The  first  dispenser tested  shall  be  the  one  used  to  dispense  flares  and the   second   one   shall   be   the   one   used   to   dispense chaff.   Notify   AVUM   if   any   improper   indications occur  during  the  tests. Assure   payload   module   is   not   connected to  dispenser  assembly  at  any  time  during the  following  test  procedure. 1. On  flare  dispenser  assembly,  assure  the  C-F selector  switch  is  in  F  (flare)  position. 2. Obtain  M-91  test  set  and  assure  that  TEST SEQUENCE   switch   is   in   START/HOME position. 3. Connect  base  plate  of  test  set  to  breech  of dispenser  assembly.  Secure  both  mounting studs  uniformly  hand  tight,  using  5/32  inch hexagonal  wrench  provided  in  test  set  carry- ing case. 4. Obtain  test  set  power  cable  from  the  M-91 test  set  carrying  case  and  connect  cable between exterior connection J 1 (28V DC) on aircraft  and  aircraft  power  +  28V  DC  (J1) of  test  set. 5. Remove  safety  pin  from  EM  and  in  the  top skin  of  the  right  wing. On  DCP,  assure  that  RIPPLE  FIRE switch  guard  is  in  down  position. 6.  Provide  aircraft  power  to  DCP  by  setting M-  130  POWER  circuit  breaker  to  ON  posi- tion. 7. On  DCP,  press  ARM  lamp.  Lamp  will  illu- minate.  Release  ARM  lamp.  Lamp  will extinguish. 8. On  DCP,  set  FLARE  counter  to  30  CHAFF COUNTER  to  30  and  MAN-PGRM  switch to  MAN  position. 9.  On  DCP,  set  ARM-SAFE  switch  to  ARM. ARM  lamp  will  illuminate. NOTE When  the  test  set  is  installed  on  the  dis- penser  assembly  and  28  volts  DC  aircraft power   has   been   applied,   the   sequencer switch  inside  of  dispenser  assembly  resets, making   an   audible   sound   as   it   rotates. There  will  be  no  such  sound  if  the sequencer   switch   has   been   previously reset  or  if  switch  is  in  position  12  or  24. NOTE On  test  set,  TS  PWR  ON  lamp  (clear) illuminates and remains illuminated throughout  the  test  sequence  until  aircraft power  to  test  set  (via  test  set  power  cable) is  disconnected  or  shut  off. 10. Set  mission  chaff  program  on  EM. 11. Perform  the  following  operations  on  the M-91  test  set: a. Press  to  test  the  remaining  three  lamps on  test  set.  Each  lamp  will  illuminate. NOTE Replace  any  lamp  that  does  not  illumi- nate  when  pressed.  If  none  of  the  indicat- ing  lamps  illuminate,  return  test  set  to AVUM. b.  Rotate  TEST  SEQUENCE  switch clockwise   to   the   next   position,   TS RESET.   No   visual   indication   will occur. c.  Rotate  TEST  SEQUENCE  switch clockwise  to  SV  SELF  TEST  position. STRAY  VOLTAGE  lamp  (red)  will illuminate. d.  Rotate  TEST  SEQUENCE  switch clockwise  to  next  position,  TS  RESET. STRAY  VOLTAGE  lamp  (red)  will extinguish. e. Rotate  TEST  SEQUENCE  switch clockwise  to  next  position,  STRAY VOLT.  STRAY  VOLTAGE  lamp  (red) should   not   illuminate. f.  Rotate  TEST  SEQUENCE  switch clockwise  to  next  position,  SYS  NOT RESET.  SYS  NOT  RESET  lamp (amber)  should  not  illuminate.  If  lamp 4-6