TM 1-1510-225-10 8-15 Operation    of    the    electric    trim    switch system should occur only by movement of pairs  of  switches.    Any  movement  of  the elevator  trim  wheel  while  depressing  only one switch element denotes a trim system malfunction.  The AP/TRIM POWER switch must  be  turned  OFF  and  flight  conducted only by manual operation of the trim wheel. (2)  Pilot   and   copilot   trim   switches   – Check    individual    element    for    no movement of trim, then check proper operation of both elements. (3)  Pilot trim switches – Check that pilot switches   override   copilot   switches while trimming in opposite directions, and trim moves in direction commanded by pilot. (4)  Pilot   and   copilot   trim   switches   – Check trim disconnects while activating pilot or copilot trim disconnect switches. f.    AP  XFER  switch  –  Select  copilot’s  side and repeat steps b through e. * 7.  FMS – Check and Set. a.  Initialize.      Insert   identifier   for   current airfield during initialization. b.  Load flight plan as required. * 8.  Voice and flight data recorders – Check. 9.  Radar – As required. * 10.  Altimeters – Set and check. 11.  FLAPS – Check. 12.  EFIS brightness – Set. CAUTION Do  not  leave  brake  deice  on  longer  than required to check function of annunciators when  ambient  temperatures  are  above  15 C. H    13.  BRAKE DEICE – Check, use as required. NOTE Brake  deice  control  valves  may  become inoperative    if    valves    are    not    cycled periodically.    One  cycle  of  the  valves  is required  daily  regardless  of  the  weather conditions. a.  BLEED AIR VALVES – OPEN. b.  BRAKE    DEICE    –    ON,    annunciator illuminated. c.   CONDITION levers – HIGH IDLE if brake deice is to be used. d.  BRAKE   DEICE    –    OFF,    annunciator extinguished. e.  CONDITION levers – As required. * 14.  Exterior lights – As required. * 15.  Taxi area – Clear. * 8-29.  TAXIING. CAUTION Never  taxi  with  a  flat  tire  or  a  flat  shock strut.    During  taxi  operations,  particular attention  should  be  given  to  propeller  tip clearance.      Extreme   caution   is   required when operating on unimproved or irregular surfaces   or   when   high   winds   exist.      If operations  produce  a  propeller  RPM  over 1600,  retard  propeller  levers  to  the  detent to  limit  RPM  to  1600  to  help  reduce  the possibility of ingestion of ground debris. 1.  Brakes – Check. 2.  Flight instruments – Check. 8-30.  ENGINE RUNUP. 1.  Parking brake – Set. 2.  Manual prop feathering – Check. H 3.  AUTOFEATHER/AUTO IGNITION – Check as required. a.  AUTO IGNITION switches – ARM. b.  POWER   levers   –   22%   torque.      Auto ignition annunciators extinguish. c.   AUTOFEATHER switch – Hold to TEST. Both AUTOFEATHER annunciators illuminated. d.  POWER levers – Retard individually. WARNING