TM 1-1510-224-10 13. Altimeters - Set and check. * 8-21.  TAXIING. Taxi  speed  can  be  effectively  controlled  by  the use   of   power   application   and   the   use   of   the   variable pitch propellers in the ground fine range with the   PROP levers retarded to the FEATHER detent. 1. PROP levers As required. 2. Brakes Check. 3. Flight instruments Check for normal operation. 8-22.  ENGINE RUNUP. 1. Mission control panel After receiving clearance from IPF set as instructed. 2. Propeller     feathering     Check     by     pulling PROP levers aft past detent to  FEATHER. Check   that   each   propeller   feathers,   then advance levers to HIGH RPM position. H 3.   Autofeather/auto    ignition    Check    as follows: a. AUTO IGNITION switches ARM. b. POWER  levers  Approximately  25% torque. c. AUTOFEATHER     switch     Hold     to TEST (both AUTOFEATHER annunciators illuminated). d. POWER levers Retard individually. (1) At  13%  to  19%  torque  Opposite AUTOFEATHER annunciator extinguished, IGN ON annunciator illuminated. (2) At  7%    to    13%    torque    Both AUTOFEATHER annunciators extinguished  (propeller  starts  to feather). NOTE The   POWER   lever   may   have   to   be lifted  and  pulled  towards  the  ground fine  gate  in  order  to  attain  the  7%  to 13% torque. AUTOFEATHER annunciators will illuminate  and  extinguish  with  each fluctuation  of  torque  as  the  propeller feathers. (3) Return POWER lever to approximately 25% torque. e. Repeat  above  procedure  with  other engine. f. POWER levers IDLE. g. AUTOFEATHER switch ARM. h. AUTO IGNITION switches Off. 4. Overspeed   governors   and   rudder   boost Check as follows: a. Yaw   damper   ENGAGE.      Observe YD ENG annunciator illuminated. b. PROP   GOVERNOR   TEST    switch Hold to   PROP   GOVERNOR   TEST position. c. Left    POWER    lever    Increase    until propeller  stabilizes  at  1540  to  1580 RPM. d. Release  PROP  GOVERNOR  TEST switch  Observe  that  propeller  RPM increases. e. Left POWER lever Continue advancing.      At   approximately   50% torque differential, YD ENG annunciator   should   extinguish,   and left    rudder    pedal    should    start    to move   forward.      Increasing   engine power    should    result    in    increased rudder pedal travel. (Observe torque and TGT limits.) f. Left   POWER    lever    Slowly    retard. Rudder pedal travel should decrease    with    decreasing    power. The YD     ENG     annunciator     may flicker     as     rudder     boost     system disengages. g. Yaw damper Re-engage yaw damper, and repeat steps b through f with other engine. H 5.   Primary governors Check as follows: a. POWER levers Set at 1500 RPM. b. Exercise propeller Move aft to detent,  check  propeller  RPM    1150 ±50, then return to high RPM. 6. Engine anti-ice Check as follows: a. ENG INLET LIP HEAT  switches  (2) ON.  Check  # 1 and  #  2  LIP  HEAT caution   advisory   annunciator   lights illuminated. b. #  1   and   #   2   LIP   HEAT   advisory annunciator lights Check illuminated. H 7.   Anti-ice    and    deice    systems    Check    as follows: a. WINDSHIELD   anti-ice   switches   (2) NORMAL     then HIGH. Check PILOT and    COPILOT   (individually) for loadmeter rise, then OFF. 8-19