TM 55-1510-219-10 WARNING Aircraft must be in flight to dispense flares. (a) Firing procedure. 1. Flares.    Upon  observing  a  missile launch  the  designated  crewmember  will  fire  a  flare.    If more  than  one  missile  launch  is  observed,  the  firing sequence   should   be   continued   until   the   aircraft   has cleared the threat area. 2. Chaff.      Upon   receiving   an   alert from  the  aircraft  radar  warning  system,  the  designated crewmember  will  fire  the  chaff  and  initiate  an  evasive maneuver.    The  number  of  burst/salvo  and  number  of salvo/program   and   their   intervals   as   established   by training doctrine will be set into the programmer prior to take-off  (refer  to  TM  9-1095206-13  for  information  on setting   programmer).      If   desired,   the   operator   may override   the   programmed   operational   mode   and   fire chaff countermeasures manually by moving the dispenser   function   selector   switch   to   MANUAL   and pressing a dispenser switch. 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. WARNING 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   ensure   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  carrying case. 4. Obtain  test  set  power  cable  from  the  M-91  test set  carrying  case  and  connect  cable  between exterior connection J1 (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. CAUTION On DCP, assure that RIPPLE FIRE switch guard is in down position. 6. Provide  aircraft  power  to  DCP  by  setting  M130 POWER circuit breaker to ON position. 7. On     DCP,     press     ARM     lamp.          Lamp     will illuminate.      Release   ARM   lamp.      Lamp   will extinguish. 8. On   DCP,   set   FLARE   counter   to   30   CHAFF COUNTER   to   30   and   MAN-PRGM   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   dispenser   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. 4-6