TM 1-1510-218-10 8A-13 (3)   85% maximum – Ground Operations. 9.   CONDITION levers – As required. 10.  Red anticollision light – Reset. NOTE To reset, turn off approximately 5 seconds, then  to  the  NIGHT  (red)  position.    When voltage    drops    below    approximately    20 volts,  the  anticollision  light  may  become inoperative.    Normally,  NIGHT  (red)  strobe is   used   for   ground   operations   and   DAY (white) is used for flight operations. 8A-28.  BEFORE TAXIING. * 1.   AC/DC power – Check. * 2.   AVIONICS MASTER POWER – ON. * 3.   EFIS POWER – ON. * 4.   CABIN    AIR/TEMP    MODE    and    CABIN AIR/TEMP switches – Set as desired. * 5.   BLEED AIR VALVES – As required. CAUTION Do  not  leave  brake  deice  on  longer  than required to check function of annunciators when    ambient    temperatures    are    above 15 °C. 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. * 6.   BRAKE DEICE switch – As required. 7.   Avionics – Check and set as required. * 8.   TCAS – TEST and set. 9.   FLAPS – Check. * 10.  Altimeters – Set and Check. * 8A-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. 8A-30.  ENGINE RUNUP. 1.   Parking brake – As required. 2.   Propeller feathering – Check. H 3.   AUTOFEATHER/AUTO   IGN   –   Check   as required. a.   AUTO  IGN  switches  –  ARM.    IGN  ON annunciators illuminated. b.   POWER  levers  –  22%  torque.    IGN  ON annunciators extinguish. c.   AUTOFEATHER switch – Hold to TEST. Both AUTOFEATHER annunciators illuminated. d.   POWER levers – Retard individually. (1)   Approximately   16%   –   21%   torque, opposite AUTOFEATHER annunciator   extinguishes,   IGN   ON annunciator illuminated. (2)   Approximately    9%    –    14%    torque, both   AUTOFEATHER   annunciators extinguished (prop begins to feather). Both IGN ON annunciators illuminated. NOTE AUTOFEATHER annunciators will illuminate and extinguish with each fluctuation    of    torque    as    the    propeller attempts to feather. (3)   Return POWER lever to 22% torque. e.   Repeat procedure with other engine. f.    POWER levers – IDLE (Both AUTOFEATHER lights extinguished, props do not feather).