TM  55-1519-221-10 8-9.  CHECKLIST. Normal  procedures  are  given  primarily  in  check- list  form  and  are  amplified  as  necessary  in  accompa- nying  paragraph  form  when  a  detailed  description  of a   procedure   or   maneuver   is   required.   A   condensed version   of   the   amplified   checklist,   omitting   all explanatory  text,  is  contained  in  the  Operator’s  and Crewmember’s   Checklist,   TM   55-1510-221-CL.   To provide   for   easier   cross   referencing,   the   procedural steps  are  numbered  to  coincide  with  the  correspond- ing  numbered  steps  in  TM  55-1510-221-CL. 8-10. USE OF CHECKLIST. Although  a  good  working  knowledge  of  all  air- craft   procedures   is   desirable,   it   is   not   mandatory that   they   be   committed   to   memory.   The   pilot   is responsible  for  the  initiation  and  accomplishment  of all   required   checks.   Checklist   items   will   be   called out   orally   and   the   action   verified   using   the   pilot’s checklist   (-CL).   The   copilot   will   normally   read   the checklist  and  perform  such  duties  as  indicated,  as well  as  those  directed  by  the  pilot.  ‘As  required” will   not   be   used   as   a   response;   instead   the   actual position  or  setting  of  the  unit  or  item,  such  as  “ON” or   “UP“   or   “APPROACH’   will   be   stated.   Upon completion  of  each  checklist,  the  copilot  will  advise the  pilot  that  the  checklist  called  for  has  been  com- pleted. 8-11.   CHECKS. Items  which  apply  only  to  night  or  only  to instrument  flying  shall  have  an  "N"  or  “I”  respec- tively,  immediately  preceding  the  check  to  which  it is  pertinent.  The  symbol  “O’  shall  be  used  to  indi- cate    “if   installed.’    Those  duties  which  are  the responsibility  of  the  copilot,  at  the  command  of  the pilot,  will  be  indicated  by  a  circle  “O”  around  the step  number,  i.e.,    Circuit   breakers  -  In.  The  star symbol " H "  indicates an operational check contained in  the  performance  section  of  the  condensed  checkl- ist.   The   asterisk   symbol   "*"   indicates   that   perfor- mance  of  the  step  is  mandatory  for  all  thru-flights. The  asterisk  applies  only  to  checks  performed  prior to  takeoff.  Placarded  items  appear  in  upper  case. 8-12.  BEFORE  EXTERIOR  CHECK. *    1. Publications  -  Check  DA  Forms  2408-12, -13,  -14,  and  -18,  DD  Form  365-4,  locally required   forms   and   publications,   and   avail- ability  of  operator’s  manual  (-10)  and  check- list (-CL). *   2. Oxygen  system  -  Check  that  oxygen  quantity is  sufficient  for  the  entire  mission. 8-2 Change  4 If  high  or  gusty  winds  are  present,  and  the flight   controls   are   unlocked,   control   sur- faces  may  be  damaged  by  buffeting. *   3. Flight  controls  -  Unlock  and  check. *  4. Parking  brake  -  Set. The  elevator  trim  system  must  not  be forced  past  the  limits  which  are  indicated on   the   elevator   trim   tab   position   indica- tor. 5. Elevator  trim  -  Set  to  “0”  (neutral). Do  not  cycle  landing  gear  handle  on  the ground. *   6. Gear  -  DN. *   7. ICC vane  pull  handles  -  In. *   8. Keylock  switch  -  ON. *   9. Battery  switch  -  ON. 10. Ice  vane  switches  -  RETRACT. 11. Lighting   systems   -  Check  as  required,  to include   navigation   lights,   recognition   lights, landing/taxi   light,   wing   ice   lights,   beacons, emergency   lights,   and   interior   lights,   then OFF. NOTE The   emergency   lights   override   switch should  be  placed  in  the  TEST  position and  the  emergency  lights  (5)  checked  for illumination   and   intensity.   A   dim   light indicates  a  weak  battery  pack.  At  the completion  of  the  check,  the  switch  must be  cycled  from  the  TEST  position  to  the OFF/RESET   position  and  then  placed  in AUTO. 12. Fuel   gages   -   Check   fuel   quantity   and gage   operation.